Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d373fb6765fbb9a…

MALICIOUS

PDF

90.3 KB Created: 2021-06-10 14:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0d2cd88c27156bb56897adf0264c2b90 SHA-1: 594003b338a63562b59971047094b8b138289ac8 SHA-256: 0d373fb6765fbb9aff14b2862e1307448fc6ca8c9f444c3bb49d0999de950131
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains text related to a 'Pubg mobile stylish text generator', which is likely a lure. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://infrive.ru/pbw?utm_term=pubg+mobile+stylish+text+generator PDF link annotation
    • https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/gujokakuja_lirugopilevevu_wupedivapu.pdfIn PDF document text
    • https://pijewiki.weebly.com/uploads/1/3/5/9/135966210/7d367cd07ec.pdfIn PDF document text
    • https://ruvedusipokowu.weebly.com/uploads/1/3/0/8/130813644/punajufaga-seguxi-zelitow.pdfIn PDF document text
    • https://tifixexeruwa.weebly.com/uploads/1/3/2/6/132682204/4871c.pdfIn PDF document text
    • https://difodofixipa.weebly.com/uploads/1/3/0/8/130814112/4268790.pdfIn PDF document text
    • https://nogegomubupof.weebly.com/uploads/1/3/4/6/134614602/timuvi-xaxevotoneboniw-tenew.pdfIn PDF document text
    • https://dobojadu.weebly.com/uploads/1/3/2/7/132711966/f659070eb4c.pdfIn PDF document text
    • https://gawilemo.weebly.com/uploads/1/3/4/0/134012872/3787641.pdfIn PDF document text
    • https://nixalimug.weebly.com/uploads/1/3/2/6/132680811/498a1849842ef84.pdfIn PDF document text
    • https://jesabison.weebly.com/uploads/1/3/4/3/134379325/a99c29b9f13a.pdfIn PDF document text
    • https://rotasemenedifo.weebly.com/uploads/1/3/5/9/135985080/guranefuzuwir.pdfIn PDF document text
    • https://lezogujivezubix.weebly.com/uploads/1/3/4/8/134878846/342f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3470f78f-2cb0-4906-a501-eb5e0d079bf4/biblia_critica_textual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025909e0-1f16-4183-9576-ed7e72649173/watoluvonegix.pdfIn PDF document text
    • http://najajufuf.pbworks.com/w/file/fetch/144762252/zumowibenirugolarajexiv.pdfIn PDF document text
    • http://tosuvop.pbworks.com/w/file/fetch/144467019/rounding_to_the_nearest_hundred_worksheets_for_3rd_grade.pdfIn PDF document text
    • http://pefumugat.pbworks.com/f/live_wallpaper_for_android_mobile_free_download_hd.pdfIn PDF document text
    • http://sujagajo.pbworks.com/w/file/fetch/144496674/gta_san_andreas_cicek_hilesi.pdfIn PDF document text
    • http://gamanovu.pbworks.com/f/bootcamp_iso_file.pdfIn PDF document text
    • http://dejimebez.pbworks.com/w/file/fetch/144776139/32248428105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c15b3e1b-f91a-428d-a07a-c3b735d56de7/dune_buggy_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53d83d4c-92d2-4523-99d3-569faf44238e/how_to_spot_drug_traffickers.pdfIn PDF document text
    • http://piwomimagito.pbworks.com/w/file/fetch/145029957/best_farming_base_th11.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE170 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 3756 bytes
SHA-256: 4073d35462403f062ff6ffad853f7b51d4f09777bbe07aa5fa7e6f9e3d5efa18
font_02_sfnt_off0000feaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAF 5292 bytes
SHA-256: b660ac8958a09e7471828f76d281067f59d4810b5679607cd07bf763041948f1
font_03_sfnt_off0001107b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107B 5812 bytes
SHA-256: acd9abe36e4ddf506b3cdda254529c3e82fde0706dea23a2d4078e32bd76a8fc
font_04_sfnt_off00011f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F14 13548 bytes
SHA-256: 4ce2d81ca2715c77884905116e39c1204323c12bbaeac67ccca27a4527efe583
font_05_sfnt_off00014c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C3A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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