Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f4803d33c2da93…

MALICIOUS

PDF

80.5 KB Created: 2021-03-11 14:51:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c69b6faedeebbe2d6422742eb5d3dcd8 SHA-1: b9949e26bae1c811ce0b2787a097e74c6f6bc6c0 SHA-256: a0f4803d33c2da931a11108acac669ea36722097205151f3cf5b5f8905aebefe
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 0.9996

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 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://golowaki.ru/aws?utm_term=where+can+i+watch+the+twilight+movies+for+free PDF link annotation
    • http://bettyloustintruckbbq.com/jajefaxiridevavosupuv0v2s.pdfIn PDF document text
    • http://1s.london/bizhub_c224e_installation_manualz4pws.pdfIn PDF document text
    • http://spoonnumberone.xyz/military_expedition_synonymssihph.pdfIn PDF document text
    • http://hellochildren.online/coursera_machine_learning_andrew_ng_quiz_answersc6ct2.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/how_to_connect_dish_to_apple_tv2rq4r.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/2jfzXVZ/identity_verification_irs.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/53jgZAT/26361440524.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/9idXQid/zinojosilurigekanegege.pdfIn PDF document text
    • http://dietnatur.fun/canon_eos_rebel_gii_manualmkeme.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1c24d8f-91eb-439e-a7f0-867709fc043a/jalizivigotazerujofezote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37976db5-6902-454a-b2f2-6ff2040099cc/mastrena_2_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ece904c-3c22-4b53-ae15-dddb5b0e9024/the_creative_spirit_an_introduction_to_theatre_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/46945098910.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/surah_al_kahf_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b100520-8422-4874-b78b-bea1b9dbbe5d/ragowal.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/5621829121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331181b9-2093-431c-a803-d5c45b3af5f5/netgear_readynas_nv_v2_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/wamigasanop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9579717-2254-4f76-a21d-1145f28480bf/what_are_the_armor_of_god.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/lagobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe727350-d272-4671-8065-6e67dc7ad651/how_to_fix_haier_wine_cooler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c47b5d-ca48-49d8-82b3-d9086ec16da4/what_to_order_at_buffalo_wild_wings_keto.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6A 5460 bytes
SHA-256: 4a7c53a5a6e229d688c1cc7464bdf6dac5d9f4b1fe421bd6390ce3e7e90f9e18
font_01_sfnt_off00010ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF6 10576 bytes
SHA-256: b048d4175ccd87be4afc8273234784651240835ee9dbe76c87bbd9f19f2ba977

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