Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd2e2ccf06702af…

MALICIOUS

PDF

76.2 KB Created: 2021-01-25 18:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9c659408f0caab345007b0c1069ffa20 SHA-1: 34a7f94c1de09c9282ddc82e0ad876dee32e16cb SHA-256: ffd2e2ccf06702af244f42e32baabf352425c3062eeb483a42be58f8dda09a9c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to files with numeric slugs, indicative of a link farm or SEO spamming technique. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://bologen.ru/aws?utm_term=articles+a+an+the+grammar+pdf PDF link annotation
    • https://negowisavu.weebly.com/uploads/1/3/1/4/131406226/aaaf5392bb86c.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/gujixakejaga.pdfIn PDF document text
    • https://bupimapigi.weebly.com/uploads/1/3/1/3/131383283/8574154.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/1247370.pdfIn PDF document text
    • http://skidki-day.site/fashion_ladybug_nail_salon_richmond_hillkqje7.pdfIn PDF document text
    • http://jerijoba.iblogger.org/guide_rock_country_corner.pdfIn PDF document text
    • http://domavera.ru/98450308614afjqu.pdfIn PDF document text
    • https://zabagogaj.weebly.com/uploads/1/3/5/3/135313674/cf99dcb.pdfIn PDF document text
    • http://saluzoz.iblogger.org/europe_aging_report.pdfIn PDF document text
    • http://pewodaz.22web.org/botujo.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://s3.amazonaws.com/dazifozixawus/18801223889.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/buzowozepuzuforu.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/burning_glass_technologies_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/84131902593.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/70941874368.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/ancova_sas_enterprise_guide.pdfIn PDF document text
    • http://kaxemazetoralib.rf.gd/tiradipikixasurabasu.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/appraisal_report_sample_for_employees.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B2 2968 bytes
SHA-256: 771033003054101e9e87eceebec65dd17fac76109d4f476580acb9549e794e17
font_01_sfnt_off0000e058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE058 5236 bytes
SHA-256: 455faacb1b25eac5b3cd31918219a1ee682dd90c67e55aadd90d8f02e7be6b47
font_02_sfnt_off0000f1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F2 10300 bytes
SHA-256: 26c571d637e7921f5f51537fb8532e23d2fb53c61d8e3f372e4518d8c4f05621
font_03_sfnt_off000114e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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