Malicious PDF — malware analysis report

Static analysis result for SHA-256 678fa4b9a8870fbb…

MALICIOUS

PDF

74.6 KB Created: 2021-04-21 11:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 06467ffbef5ebdc3f8582b0dde432093 SHA-1: f4cfdbd40c5cd2f2a8cfce9b71d692670ea645ad SHA-256: 678fa4b9a8870fbb04e51947c7ed3624f0c760018a2a15b9a44dbbbd772c6861
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting services, indicating a link farm or redirection scheme. The presence of a URL with a 'strik' path and a query parameter related to car battery chargers suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=why+does+my+car+battery+charger+not+work PDF link annotation
    • https://cdn.sqhk.co/raratajuxu/9pxSQge/fabric_bed_sheet_painting_design.pdfIn PDF document text
    • https://ranumurubakek.weebly.com/uploads/1/3/5/3/135341533/sowilonivom-maxetuvakaxusib-taxevurep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_604d325f73d62.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/hh60mL2/survival_island_evo_2_pro_hack.pdfIn PDF document text
    • https://gisixumaxen.weebly.com/uploads/1/3/1/8/131856636/1655247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500674/normal_5ff52597af2d7.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/TmS2Lgd/coniugazione_verbo_apprendere_forma_attiva.pdfIn PDF document text
    • https://raminatu.weebly.com/uploads/1/3/4/5/134579417/5553102.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/Kcge6hd/19076756996.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/b9fH8hg/download_my_little_pony_story_creator.pdfIn PDF document text
    • https://zumikifekov.weebly.com/uploads/1/3/0/8/130813997/zexota.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/irWvV0U/black_forest_cake_photos_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/icOFmic/gewim.pdfIn PDF document text
    • https://gamekesilib.weebly.com/uploads/1/3/4/8/134892139/3661793.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_07861f2d44124bc296ba7c16db2fe5b1.pdf?index=trueIn PDF document text
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_b0b82afec33242ec832b9a2e7076bb92.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 5732 bytes
SHA-256: 01a1ba8f397b962f4bad0440f685f108657293713c12385c41f69d1b8a4bf815
font_01_sfnt_off0000f84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84E 10688 bytes
SHA-256: d1d30f4f2dd83676e0930af5ad69992ce6bf982cd96056155ac3036ae51124ca

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