Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e117066306fc097…

MALICIOUS

PDF

68.1 KB Created: 2021-03-21 07:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8136c8de365d295699d510d8d6f9f4d6 SHA-1: 2d54b8537ec2bec337709d76ec61c4a7f90bea24 SHA-256: 2e117066306fc097df61c571dba7f73e0630743f26f1882c2059ef7b416c34e1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 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://midufefew.ru/award?keyword=integral+calculus+by+shanti+narayan+pdf PDF link annotation
    • https://cdn.sqhk.co/vujenibolo/jgjeiRK/ping_pong_vr_ps4_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472221/normal_60224aa0a9ac1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500878/normal_5ffd5e76b1bc5.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/UiiXR52/radian_angle_math_definition.pdfIn PDF document text
    • https://nuvafuriwevejuf.weebly.com/uploads/1/3/2/8/132814848/soguvunab.pdfIn PDF document text
    • https://cdn.sqhk.co/nelufebo/1hjEEgn/marist_college_ashgrove_uniform_shop_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/lewuravasu/hdibhjF/38211413719.pdfIn PDF document text
    • https://balabirow.weebly.com/uploads/1/3/4/6/134690292/4880033.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/jcMFRnh/45040187050.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402932/normal_5ff7c8db9c6e9.pdfIn PDF document text
    • https://tizukusijevawus.weebly.com/uploads/1/3/4/4/134454617/2995fc32ac26d.pdfIn PDF document text
    • https://cdn.sqhk.co/dodipenameki/Beix1gf/foromanozonidupilela.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
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_b099d97debd54c1e8d56679c34087c57.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c54662-7c7e-4599-ab81-69d9f44cf49e/54571370408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b5e157a-d130-4e8d-bddb-baa9abebaeb2/nadesavo.pdfIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_268a95e0346143b5b6acf1cd66ef9fe4.pdf?index=trueIn 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_off0000c0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DB 5368 bytes
SHA-256: e8368a42044cfc61ced5e8793c0aa2b0d44f2225c3caa704ab423e0d0d3fb14c
font_01_sfnt_off0000d308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD308 10032 bytes
SHA-256: 04ffa0cce208b0d408ad00e26aae4e2e6ddbae3c5c59c2b718e428e8fd722f77
font_02_sfnt_off0000f55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.