Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1cc321a36f81d59…

MALICIOUS

PDF

96.5 KB Created: 2021-04-10 00:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f55f38c653c83dadb6992d6bf4b7a97a SHA-1: e20f4ae588a40a71916659d97d74a4de2793cd88 SHA-256: e1cc321a36f81d59a9fd44a48add116d4d5a3dfa074d23df17601dfe2c62b310
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many pointing to disposable hosting, and at least one known malicious redirector. The primary purpose appears to be to direct users to external, potentially harmful websites, consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=the+game+book+neil+strauss In PDF document text
    • https://cdn.sqhk.co/wafifovuwel/gjegfl2/lefadevebizavutit.pdfIn PDF document text
    • https://cdn.sqhk.co/naxaroja/ha7j32i/carrots_are_divine_bugs_bunny.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/NhhNjaU/zixifarago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484156/normal_600c6d51bdc29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393181/normal_603aa0dad78e4.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/KJ4hhgh/best_tuner_for_99_7._3_powerstroke.pdfIn PDF document text
    • http://mitedujonajezed.scienceontheweb.net/65323462243.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/hDSQhdD/legendary_stuntman_run_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404287/normal_5fefdf9f26f59.pdfIn PDF document text
    • http://kipegujodup.getenjoyment.net/definition_of_strategic_marketing_management.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoletef/fugjBia/angry_birds_2_clan_battle_10_21_20.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/3jj4ji5/dovak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454046/normal_603500594a297.pdfIn PDF document text
    • https://cdn.sqhk.co/tolademapati/hWma2YS/flying_monkey_newington.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408853/normal_603e38a600690.pdfIn PDF document text
    • https://cdn.sqhk.co/bipadifudame/egf8Chd/97356947458.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_769f6512a89c4c56ada4babf7cfac29e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3fc162-b8fa-4a1d-82ac-2cc66404d99e/gafojajipir.pdfIn PDF document text
    • http://fegoluvarelewum.myartsonline.com/64942181863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2636612-33a8-40aa-98d8-af755a978e83/nodakazedugin.pdfIn PDF document text
    • https://5862e4ea-63a6-4c92-af93-e06d02d1a664.filesusr.com/ugd/eaa371_2453ce183c8343459d69fa8ae9649c33.pdf?index=trueIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_44a18caf2e1f4558a7968a9e5948313b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f85888de-75ab-43d8-98c8-faf35647f421/11269508530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ae5422-f768-470d-806f-961c4ddeac59/28308397909.pdfIn PDF document text
    • https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_fd2aa70648d443a6b0b58a46a445ffee.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11767 5252 bytes
SHA-256: 1216e23ac9f656bc052ca739e28720fc3fec2171e9de258c3fa9e7cfa1953f14
font_01_sfnt_off00012913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12913 3408 bytes
SHA-256: d86d52665cf8617db47dec18a7a51435048b4c3f4d4c128a71f26d81ae95d15e
font_02_sfnt_off0001360c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1360C 11104 bytes
SHA-256: f41828bfa031d0a4c8da2c077e07dcd80dc6f97bc5ab7a083d7b5ee0a6f6d841
font_03_sfnt_off00015c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C17 16344 bytes
SHA-256: f3b95f1269985bafc3dfb9b5b35e76df8a4d57039a143c013aed99c7cf3a4a89