Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7cb04960aecebe…

MALICIOUS

PDF

78.3 KB Created: 2021-03-16 03:59:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: ea1adbea2a12602c83324f27836b53df SHA-1: 4958ca2f72b808d76b1e754a27dc9927ee87492c SHA-256: 7f7cb04960aecebe068bc2fbd508447480712ca91c5b1ea158ba8f07c52b7362
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or content-luring scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing unwanted content. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing attack aiming to trick users into downloading further payloads or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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 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://jottigo.ru/award?keyword=brazil+visa+application+form+pdf+for+nigeria PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407304/normal_5fcc429d5687a.pdfIn PDF document text
    • https://pipokusu.weebly.com/uploads/1/3/3/9/133997176/7f3f588c81012.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387230/normal_5feb068c95a6c.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/bQRAhj5/jajijesabenugofofipidewi.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/669504.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488570/normal_5fc59f2457616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496391/normal_601915e44061c.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/XG11Ndc/bein_sports_3_live_soccer.pdfIn PDF document text
    • https://tirokaroxere.weebly.com/uploads/1/3/2/7/132740449/besuvonazifegot-lazisinune.pdfIn PDF document text
    • https://jodulimije.weebly.com/uploads/1/3/4/7/134732884/tolumamebofop-kuxipusop-danerumuzerotaj-ziwixofogewop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416934/normal_5fee46c625cf6.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/sjaghjc/ziganevajorufug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412174/normal_60409e8217cde.pdfIn PDF document text
    • https://cdn.sqhk.co/mosizuwowux/GhhXrRZ/wamores.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/95446938707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449397/normal_603272181f278.pdfIn PDF document text
    • http://nulivanofika.mygamesonline.org/gogejepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_6040c2d27417f.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/bVfgdjd/danemajasokigafofopakib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418379/normal_60373002601bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420230/normal_601f11968bca9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xowilewegiwo.myartsonline.com/most_valuable_spiderman_comics_from_the_80s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da34f2f9-151e-4a9d-893f-91a96a3e4b90/tiwak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53948f82-df5c-40fd-8b5b-1c019ef2ff4a/ximukemofumibogal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d13fb48-ad59-4429-8716-3d87a2e93d63/the_game_plan_cast_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8151e08b-696a-41d0-a247-bd6b563b580d/74495066586.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_off0000f04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 5636 bytes
SHA-256: bccc43c8f6ba8082a51d4953e919b108472c0f654f01fe6be65eed371e5cea8a
font_01_sfnt_off00010378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10378 11168 bytes
SHA-256: c16cf03dadd85c5941d4dd6ce6cfb29a9d5dae1acaaca3559c0b11e777bc8f60