Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d1dffcab5c9b7d…

MALICIOUS

PDF

79.9 KB Created: 2021-03-18 13:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 96461cf390a9bde48d79e080d8b3bc00 SHA-1: 055f88314921005a02ac64e49b6d836eb2ebdf96 SHA-256: d8d1dffcab5c9b7d9c62b67a241853a67eaef34f14ad3743d024a3af0aebc4c7
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and potentially malicious content, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. ClamAV also detected this file as Pdf.Phishing.Trojan. The embedded links suggest an attempt to redirect users to malicious sites, likely for phishing or SEO spam.

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://zajinet.ru/wix?keyword=digimon+story+cyber+sleuth+hackers+memory+field+guide PDF link annotation
    • https://cdn.sqhk.co/fegibidizog/FjgPGAV/outfoxedgaming_face_reveal.pdfIn PDF document text
    • http://kafidovomiguvo.mywebcommunity.org/didojevuwitanopixe.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/ajfigge/24370053029.pdfIn PDF document text
    • http://javefuxola.getenjoyment.net/remow.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/Pia8Jhf/ruraraduzibufezovojutoz.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/GdMiahd/among_us_free_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/suwefememe/thiXgjm/sewubalotifa.pdfIn PDF document text
    • https://cdn.sqhk.co/kezomerameki/Yhhoehf/jaruwebapigixe.pdfIn PDF document text
    • http://niwadeg.mywebcommunity.org/78024008723.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/igjogi7/nixotaxap.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://uploads.strikinglycdn.com/files/1df5ce20-5823-4809-aae0-6326050d333c/panasonic_cordless_phone_troubleshooting_no_dial_tone.pdfIn PDF document text
    • https://d6236f05-450e-4b96-9875-1783d83c708b.filesusr.com/ugd/912de2_d8435db1a30e4d238446f40563fa0cf1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd48833-6c1e-4e65-9a66-a4f6cefbc558/what_are_the_top_social_problems_in_america.pdfIn PDF document text
    • https://5c09c65f-4728-49e3-9562-8692e696fc4f.filesusr.com/ugd/32acb1_b8f80efd90f5415a85c3571c715415b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced5ec58-1ca1-49b1-b94c-3ca5afc6153f/genie_pro_screw_drive_no_learn_button.pdfIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_6f69066d119c4a0cb705015d43754f82.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c55a68-c912-41d1-94f7-0871f4784308/para_monitorear_redes_lan.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_off0000eb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4A 5624 bytes
SHA-256: 28b2aee708f5777d2ed8ec8bdd51e57e4efb524e761539e914f3a6593f734409
font_01_sfnt_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 10428 bytes
SHA-256: 56071d18e8516904608efdad952fe6a30b6d55c23ace79974e193dd3d25530b1
font_02_sfnt_off000121f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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