Malicious PDF — malware analysis report

Static analysis result for SHA-256 85269179cc16a8fa…

MALICIOUS

PDF

159.3 KB Created: 2021-06-11 04:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 011e248871899b3ea1aa4e626ddeabce SHA-1: b75b1083dbcf6c7f27f0df4de78a2129f10d0a65 SHA-256: 85269179cc16a8fa59599445b906f6a707dbbe59eacdc1d4e8eee7795cb6613e
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://synerhu.ru/pbw?utm_term=streaming+film+crash+landing+on+you+sub+indonesia PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419195/normal_5fe44aac2c366.pdfIn PDF document text
    • https://getawotenag.weebly.com/uploads/1/3/4/4/134443600/wimoriwiza_pixafulabakunev.pdfIn PDF document text
    • https://zatetemaf.weebly.com/uploads/1/3/4/4/134494585/tuvofata_wixoneno.pdfIn PDF document text
    • https://peninugeba.weebly.com/uploads/1/3/4/6/134666339/kawidevuraz.pdfIn PDF document text
    • https://linikakisevokeg.weebly.com/uploads/1/3/6/0/136098208/fegaro-linozumubibarod.pdfIn PDF document text
    • https://guferewefozitak.weebly.com/uploads/1/3/4/3/134393558/wetigovu.pdfIn PDF document text
    • https://foxanebipukete.weebly.com/uploads/1/3/4/3/134309218/2035500.pdfIn PDF document text
    • https://toxodapakaxoza.weebly.com/uploads/1/3/4/5/134525452/6302153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493550/normal_601e5674b2d39.pdfIn PDF document text
    • https://tufimepasomije.weebly.com/uploads/1/3/7/5/137514275/9844576.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/rubixumavekid.pdfIn PDF document text
    • https://ritajixudigozik.weebly.com/uploads/1/3/5/3/135345652/zatuxefowo-tawafaxef-suvajawamobe-ximuna.pdfIn PDF document text
    • https://tojogemul.weebly.com/uploads/1/3/4/3/134360812/b1759c79381a89.pdfIn PDF document text
    • https://xediziku.weebly.com/uploads/1/3/1/3/131384396/linukoziselowi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9140cb2-be77-4637-a0ff-eb2d7921cbf5/kenmore_front_load_washer_error_code_fh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f44a9e2-48fd-4eac-ab50-e0b311c5c85d/how_do_you_write_an_argumentative_introduction.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/answering_phone_calls_with_apple_headphones.pdfIn PDF document text
    • http://penezilo.pbworks.com/w/file/fetch/144801690/english_funny_stories_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f36cd0-589d-42b3-a01b-e674cbb280bb/what_is_the_optimal_diet_for_health.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4424bc-14ec-4734-93ab-9574780933b1/why_wont_my_snow_thrower_start.pdfIn PDF document text
    • http://sufasujozu.pbworks.com/w/file/fetch/144657366/ultrasurf_free_download_for_windows_7_32_bit_latest_version.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B897 40636 bytes
SHA-256: 2ddf0986eb2ee7d46436656254662e20a638557cad6bbab2af4862d5dda6a5d6
font_01_sfnt_off00023188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23188 5780 bytes
SHA-256: a75adb087f8029a95d8ada14dc354ad710283cb9998929f6cb153ef74cf75add
font_02_sfnt_off00024514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24514 11860 bytes
SHA-256: f4458a2ff7b2604d1d1358bc34db6feb4de1f551d8f22b3f2406b0d521128cef