Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec3f1602457da6e…

MALICIOUS

PDF

90.8 KB Created: 2020-12-17 16:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0e1a6e37a80df450ee45354b5f238a9 SHA-1: 6c119952af269fad85c8a896c4768d25108ccd54 SHA-256: eec3f1602457da6ee50a70d5084c3b19b84c57c518810cfa48bba624a688e1c5
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a link farm. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of malicious links is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=48+volt+inverter+reviews
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/paves.pdf
    • https://cdn-cms.f-static.net/uploads/4460954/normal_5fd152871bdf4.pdf
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/wewodarovegezabegove.pdf
    • https://nigovazimosa.weebly.com/uploads/1/3/4/6/134636686/101480.pdf
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/wewofu-lejepiramuri-melumekabarolul.pdf
    • https://cdn-cms.f-static.net/uploads/4416939/normal_5fda94ba99f8c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc53aa03398ff75154a37f3/t/5fcedf91509e863c68211b2a/1607393173619/zumegen.pdf
    • https://static1.squarespace.com/static/5fc5dced0b6b03258f575f14/t/5fc642cb6457125654113645/1606828747225/hydro_dipping_film_deer_skull.pdf
    • https://static1.squarespace.com/static/5fc18f8d0a2757459be7919f/t/5fccb88f33187724c4ee587f/1607252113457/baby_shark_christmas_wrapping_paper.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd22a4de24616dd48f70db/1606230692683/inferences_worksheet_1.pdf
    • https://static1.squarespace.com/static/5fc4d1fde5c7695ca9b4aca3/t/5fcdb20133187724c40f8a0c/1607315970032/18019074863.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcffbcedabee7b4407c749/1606221756118/vanuvufolewaxo.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf52a73570fb44d1f9727b/1606374056052/premier_pet_fountain_instructions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012832.bin
d9e6099d612ab2b2c5783fb12f80750860534183a0136cc190f3d7674658dab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12832 4808 bytes
font_01_sfnt_off000138b7.bin
35d457196252269b72a94ef495db963b9d6d0919b73a3931c0fc20cc86756fe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138B7 11048 bytes

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