Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed503e7b88fc3a2…

MALICIOUS

PDF

79.9 KB Created: 2021-06-09 00:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: db143815d9001575377ee54fe770da58 SHA-1: e36d7c50e998c05a1c58a9212e1697d17e8ac54c SHA-256: 8ed503e7b88fc3a2e3dc200f927f15584d07538d8e28839145c904a6184e5f36
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=watch+avengers+endgame+online+free+fmovies PDF link annotation
    • https://putujagojosid.weebly.com/uploads/1/3/0/7/130738675/dexikekano_zakekup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_60326ae020c7a.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4475987/normal_60b5e8c75d7e1.pdfIn PDF document text
    • https://xujajogasugoni.weebly.com/uploads/1/3/4/5/134514057/lazaguja_fosim_nabesemexig_xugukinele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5fe9802059023.pdfIn PDF document text
    • https://lopodegif.weebly.com/uploads/1/3/2/6/132695694/zumomerifowawerudejo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468289/normal_5fef507612947.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427781/normal_5fc954aeccd95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_6063635be4cc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476930/normal_5ff59faeb825a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_604a6347557fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466364/normal_6031671bf370e.pdfIn 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://nosiravuga.pbworks.com/w/file/fetch/144445182/how_to_get_unlimited_coins_in_subway_surfers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd40a39-3f63-4256-9ffe-d67423f1f7bb/what_we_talk_about_when_we_talk_about_love_download.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144418245/long_vowel_worksheets_for_first_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c522399-fdb4-4472-95f9-4f0d172b36ef/36930302150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd1e0c9-87f3-44a2-a769-b6fa7bfebb02/calories_bojangles_sausage_biscuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53ce934-0d57-4389-95b8-4a25fe2c2d58/let_us_make_man_in_our_image_nkjv.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 5296 bytes
SHA-256: 0a82fdbbf213a1e6c1e80fb1da15e165419a604b2313920c6a5deb7e556ce8b0
font_01_sfnt_off0000fdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 10708 bytes
SHA-256: 86d9f9672b4edb072d2b10bbeab7f727b020fa5a4ba9bcbd3ac3ce77fc430b01
font_02_sfnt_off0001221a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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