Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e846151f50a0ca…

MALICIOUS

PDF

88.9 KB Created: 2021-06-01 22:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 036d9deeb84e979eef5ebb50c80c91c4 SHA-1: 52a975a15c70f9b130b33cdba123c817fcb4d01d SHA-256: 07e846151f50a0cac2608a1db1e121ecb4a4ad25d33c868c68f48ab081f26e13
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which point to disposable hosting services and appear to be part of an SEO link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crysiq.ru/pbw?utm_term=wondershare+data+recovery+apk+for+pc PDF link annotation
    • https://nawigabijaku.weebly.com/uploads/1/3/4/5/134599080/3904470.pdfIn PDF document text
    • https://jotelozaji.weebly.com/uploads/1/3/4/4/134484012/1c09bef9.pdfIn PDF document text
    • https://vekukexulijoj.weebly.com/uploads/1/3/4/3/134397774/puxufalinigirip-tudize-fofoz.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/4079917.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445745/normal_5fcab31b7c171.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370263/normal_5ff3de9ea2262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405945/normal_605db51a1cb0e.pdfIn PDF document text
    • https://nupebovewurezo.weebly.com/uploads/1/3/2/7/132710783/9558408.pdfIn PDF document text
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/muzubesasajeti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451205/normal_5fec2a99868c5.pdfIn PDF document text
    • https://lowezikalazana.weebly.com/uploads/1/3/0/9/130969016/8246849.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zewalar.pbworks.com/f/download_game_mortal_kombat_trilogy_android.pdfIn PDF document text
    • http://palixazoke.pbworks.com/f/how_to_connect_denon_heos.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144424917/23559345681.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/w/file/fetch/144441435/jabafibavoradazuza.pdfIn PDF document text
    • http://barumena.pbworks.com/f/what_does_trf_stand_for_in_avid.pdfIn PDF document text
    • http://zogekinovag.pbworks.com/f/pilot_flying_j_employee_login.pdfIn PDF document text
    • http://gifavipa.pbworks.com/f/2015_vw_passat_repair_manual.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/f/11770859590.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144423120/91917937450.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f8c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF8C4 15572 bytes
SHA-256: 40752214531e70487cd01abaadfb74b5d73d96b9d78ffd1ab24ae62933b55bf6
font_00_sfnt_off0000e71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71F 5192 bytes
SHA-256: 5d23cecdc26ca327e4c2405412f47010671a40c7ed7879b6bff4039e8832907d
font_02_sfnt_off00012358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12358 10588 bytes
SHA-256: 1f4210833a87d5b587f6afdfeef2f93fcb38d1598fee6cbe291f1a808edba176
font_03_sfnt_off0001479d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1479D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e