Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7fcb83010b4d5c…

MALICIOUS

PDF

82.0 KB Created: 2021-03-17 21:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 88f436dea9109f6325d80f08b65451c8 SHA-1: 3bd639a7c9bf2e52fcb298c87a7bbac5e5254d67 SHA-256: fe7fcb83010b4d5c2f41cbb8af28b8d5cab3d06a78768fafd73eaa49639fb8c1
186 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 disposable domains and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the structure suggests it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://baarspo.ru/aws?utm_term=what+age+to+use+baby+einstein+jumper PDF link annotation
    • http://ezfix.asia/paxujusuzogisugalolim13pq.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/lhgjehg/revolut_business_account.pdfIn PDF document text
    • http://repair-telefonov.ru/18412689479ua2xb.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/pheE9ji/53867545711.pdfIn PDF document text
    • http://ruszaimclub.ru/26049355131w2moo.pdfIn PDF document text
    • https://cdn.sqhk.co/dozawulu/Chfhjia/skylanders_dragon_fire.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/jc891gd/six_pack_beer_cooler_sleeve.pdfIn PDF document text
    • https://vilegewadaw.weebly.com/uploads/1/3/5/3/135324537/ef1684a2008.pdfIn PDF document text
    • https://cdn.sqhk.co/lupokuna/jMjjhih/45596585562.pdfIn PDF document text
    • https://cdn.sqhk.co/sopaluwokaja/TATXbAZ/doom_eternal_heavy_cannon_precision_bolt.pdfIn PDF document text
    • http://tamakar.xyz/bazajelakadloj1.pdfIn PDF document text
    • https://kagebavewijove.weebly.com/uploads/1/3/0/7/130740568/kefexosofexab_fozikilo.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/jeqo3ic/amazon_online_mobile_recharge_offers.pdfIn PDF document text
    • https://lamuwopinu.weebly.com/uploads/1/3/4/6/134632291/686d98f5.pdfIn PDF document text
    • https://tegidaweriwasul.weebly.com/uploads/1/3/1/4/131483440/wifaxezo.pdfIn PDF document text
    • https://wurixexaf.weebly.com/uploads/1/3/4/8/134865586/natalikugi-misuv-rugozuvo-kufibefafu.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/f6uFUDK/cubacel_recarga_exterior.pdfIn PDF document text
    • https://cdn.sqhk.co/nemovofa/hhm7Cyd/50009084741.pdfIn PDF document text
    • http://xejeboge.22web.org/what_is_a_dtr_in_crochet.pdfIn PDF document text
    • http://puruzil.iblogger.org/dudelukuvefoluwamotos.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/MHRjdhd/68488412520.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
    • http://supitemev.rf.gd/65639314315.pdfIn PDF document text
    • http://wuduzukatej.epizy.com/4274482007.pdfIn PDF document text
    • http://kabewusibun.epizy.com/58227033942.pdfIn PDF document text
    • http://nodimetonakijeb.epizy.com/tukakagavusuginebenekojaj.pdfIn PDF document text
    • http://mulisujasaliba.epizy.com/sezokiroxejujoxow.pdfIn PDF document text
    • http://miwufojo.epizy.com/bitomaruselabemapavumib.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_off0000f389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF389 5412 bytes
SHA-256: 365a9de0100b88feacdbf8f5b882227fd4f30f79e6d7217505c01ab1e9a3bae2
font_01_sfnt_off000105d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D4 10732 bytes
SHA-256: 468807cc51d5047bd50d478f6f71b1903f4255382fe6a565b9df0e9c231815b2
font_02_sfnt_off00012a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3