Malicious PDF — malware analysis report

Static analysis result for SHA-256 380cd3ad8d554141…

MALICIOUS

PDF

79.6 KB Created: 2021-03-12 14:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b60e76a329fc9659fad852283d6ffd26 SHA-1: 2a93d28e25b6262e7804ee1101e81f1ae66b01e1 SHA-256: 380cd3ad8d55414170eb02bdef0de19b8396e2a8b729d07b23763ab8107e70e1
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is classified as malicious due to its extensive use of link farms and suspicious domains, aiming to redirect users to potentially harmful content. The PDF contains numerous external links, many hosted on disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 8

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://fokemale.ru/wix?keyword=can+am+ds+250+service+manual+free+download PDF link annotation
    • https://mateboxabivof.weebly.com/uploads/1/3/4/7/134763458/3901491.pdfIn PDF document text
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/7146007.pdfIn PDF document text
    • https://zukuvexoxowi.weebly.com/uploads/1/3/4/5/134597017/ba3ec0b3c604f2b.pdfIn PDF document text
    • http://bolipoloweda.mygamesonline.org/63894899425.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/jexixijoxotopiranix.pdfIn PDF document text
    • http://fenellalucynelle.info/pukatugirigakozobikon7480e.pdfIn PDF document text
    • https://dubevatuw.weebly.com/uploads/1/3/0/9/130969539/998aeb.pdfIn PDF document text
    • http://ig-supportcenter.xyz/480278488921vymb.pdfIn PDF document text
    • http://lifeit.pro/57304351052mhilk.pdfIn PDF document text
    • https://xororawezajeber.weebly.com/uploads/1/3/5/3/135338150/jozoburaxujig_nowukakux.pdfIn PDF document text
    • http://suvekitubexeso.getenjoyment.net/bolt_astm_a325_standard.pdfIn PDF document text
    • https://fukukajapojuj.weebly.com/uploads/1/3/2/8/132815924/sirevibufu-jefisofepu-zolowasixuj-vagizagono.pdfIn PDF document text
    • http://meetcabinets.xyz/nupakuwemeutnu.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/pdf_split_merge_download.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/bengali_to_english_dictionary_download.pdfIn PDF document text
    • http://rankingcoach-seo.com/yellowstone_season_3_episode_1888b2.pdfIn PDF document text
    • https://ritiburup.weebly.com/uploads/1/3/0/8/130814353/3154067.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sadoboxijowem.myartsonline.com/bissell_steam_cleaner_1383.pdfIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_05c8966cb6804c528d83fe4f16bb1655.pdf?index=trueIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_a486229f33754b83b49073266fe057ac.pdf?index=trueIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_75e6ca8a5ddb43d89bc5253a6d504d7c.pdf?index=trueIn PDF document text
    • http://kipazafar.atwebpages.com/what_does_van_mean_in_english.pdfIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_76c0ad43176e4a0486e25d71d6d119c5.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_off0000fa3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3C 5624 bytes
SHA-256: c3cf1a7d3b69cc0fa7aa23b5c48a25de11d1d60227c1bcffc637901fe966b14f
font_01_sfnt_off00010d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5F 10196 bytes
SHA-256: 9a46684d4d7b2452d56d3ebbdf29cf2cc181194a286078c4af14944a35fc0b35