Malicious PDF — malware analysis report

Static analysis result for SHA-256 d578d0a846e83ff1…

MALICIOUS

PDF

88.4 KB Created: 2021-05-03 10:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cfe87bd296b78638fd59150cb2b7970f SHA-1: 0ad88bf2081459d2f11aecbac3b606dba32c5690 SHA-256: d578d0a846e83ff1c73a594c530abc991536d0dd4177ed21bbf695c1c97eb926
194 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, characteristic of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gimoguvi.ru/strik?utm_term=allen+bradley+plc+programming+software+simulator PDF link annotation
    • https://cdn.sqhk.co/zudilubal/i9ifiif/non_travel_bucket_list_ideas.pdfIn PDF document text
    • http://microdigitalmeter.xyz/83116060561ic3lx.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/aYpYNHE/prem_top_scorer_20_21.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/fjhjwha/51431657678.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492272/normal_5fd06343d555a.pdfIn PDF document text
    • http://3-bureaureport.info/batterie_pour_gps_garmin_nuvi_2595lm24j79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474220/normal_605a383add316.pdfIn PDF document text
    • http://naturwows.space/1001_arabian_nights_stories_in_malayalamwrou0.pdfIn PDF document text
    • http://chategratis.online/30715553246jvdbx.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/FBhgwja/tiki_taka_trailer_zee5.pdfIn PDF document text
    • http://slimitalia.space/where_can_i_buy_a_battery_for_my_kindlesifw1.pdfIn PDF document text
    • http://x-bionic.shop/how_to_learn_stock_fundamental_analysistdjwk.pdfIn PDF document text
    • http://meetsoda.pro/adobe_illustrator_cs6_free_for_pct9wy3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481662/normal_5ff3dd5ccd87e.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/aMeKjfl/describe_the_strategic_management_process_with_examples.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383445/normal_5ffc75a6bfc9d.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/AghVfhg/jowawudi.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/ZwieXCv/xikimu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eeeff038-21f9-42a6-bde0-cd945221d618.filesusr.com/ugd/9dc459_6f9adbfb185c4f25b5c9af0d0c6e8799.pdf?index=trueIn PDF document text
    • https://be5a03d2-cb36-429a-bb4d-4773f067dd3b.filesusr.com/ugd/b46ca8_248bbcf4f598445594a6118f25a193f7.pdf?index=trueIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_95dd5545d45a48828005fa432be14f81.pdf?index=trueIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_9a013668e2664a16b748760c7dcc97a4.pdf?index=trueIn PDF document text
    • https://9170d309-caca-4186-8987-bf6b40ce219c.filesusr.com/ugd/baef12_28eb1633baaa46a787089196d7b8333d.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_off000117d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D5 5796 bytes
SHA-256: a11ddc7996ce9c2919da49872f38c3e8445eb2a575db324c6d4aaa062ab85380
font_01_sfnt_off00012b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8D 11076 bytes
SHA-256: 0992bc39401c45de8d7b0b64b95d272fe1ecf22d4415a059e08478de0c43af37