Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9cf32dd27784f5c…

MALICIOUS

PDF

104.8 KB Created: 2021-05-29 14:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4357ac67e5670b03f7a3f9b4f630db26 SHA-1: d0f2e5460026028b6612587b531f779305a89415 SHA-256: a9cf32dd27784f5cf57d2765dedefdf30da5f9a06084ab2d0ab923fe2ad29d2f
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector and another for a link farm. The document body, though heavily obfuscated, contains text related to 'Clash of Clans' and application metadata, suggesting a lure. The presence of multiple disposable hosting links and a malicious redirector indicates a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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=clash+of+clans+town+hall+11+base+war In PDF document text
    • https://xuvibelatubeni.weebly.com/uploads/1/3/5/3/135306186/c80018abc69.pdfIn PDF document text
    • https://suduwigopoda.weebly.com/uploads/1/3/4/5/134587425/rusijiwif.pdfIn PDF document text
    • https://tugarekuxu.weebly.com/uploads/1/3/4/3/134307697/vojos.pdfIn PDF document text
    • https://lotutomoze.weebly.com/uploads/1/3/4/3/134309944/1187630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426269/normal_605c1183d0e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_6010915e42033.pdfIn PDF document text
    • https://xiwiriled.weebly.com/uploads/1/3/4/8/134899872/zalaziwepevamol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484835/normal_604f0d6a5f7e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379234/normal_5ff944a957894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_6020d5f659b55.pdfIn PDF document text
    • https://govenovu.weebly.com/uploads/1/3/4/7/134701044/kamemitadanidejodizi.pdfIn PDF document text
    • https://mexakogu.weebly.com/uploads/1/3/5/9/135981712/xenakifitej-vidibikabuli.pdfIn PDF document text
    • https://gepufefodu.weebly.com/uploads/1/3/4/0/134013389/4425474.pdfIn PDF document text
    • https://lewofadexireg.weebly.com/uploads/1/3/4/8/134868993/2130200.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/127e0ca2-16e5-43ed-94d8-9328df522396/87827717948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35bfd25-fd84-4dd2-a158-f1df9c1ab583/how_to_file_an_aflac_wellness_claim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b7be3d1-a37f-49de-aa45-aaae8bf39266/build_my_life_chords_chris_tomlin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa30d20-ff7d-4e45-b124-523b48aad84a/xakenafofopipojomidelideg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35ed0252-956c-4be0-b151-26d37604f3db/90228780197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4174f3-a1a7-4f9f-8da4-96172f3fc2dc/71211145366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87f42efd-8e00-4e43-9959-20eeaa8743e3/how_to_cite_a_tweet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4798efb-d9d5-4f3a-a7c2-aa1c7da78f29/70402138624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0368b35c-8179-4ab6-847e-31675a5e120a/do_all_lexus_is300_have_2jz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c79bab-9adb-41e4-8c8b-7e37f95a6156/sugexefiburefex.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14567 5156 bytes
SHA-256: 17514e1481feae2f80630892aface81f4353b9731f44a44dfe86f843fde89315
font_01_sfnt_off00015705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15705 12136 bytes
SHA-256: 532d307023c9b62c9cfacc35a59761787d3f23ea6575820ff951d3e3537e7380
font_02_sfnt_off00017fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FCB 16212 bytes
SHA-256: 6efb40b268911f72f267e7c519822e53a8eff306e9ccfbf8176a1cca38c35909

Open this report in the interactive analyzer, or submit your own file for analysis.