Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc7a371d92e4274…

MALICIOUS

PDF

79.8 KB Created: 2021-02-15 23:12:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e687d9ebaf6d2327c093d5dbcff15ca8 SHA-1: 034681b463f62fb88b3ff819f5df51e240fd41df SHA-256: 5fc7a371d92e4274fce800a27376a00cd9c94b3c8eb59d4b9606467435f81ac2
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links suggests an attempt to redirect users to potentially harmful websites, consistent with phishing or malware distribution campaigns. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to exploit users through external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://maypoin.ru/123?utm_term=powerflex+4+f005+fault PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408583/normal_5ff71bc779846.pdfIn PDF document text
    • https://sozagigojo.weebly.com/uploads/1/3/1/4/131454883/tofefepadarikugas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373749/normal_60023f5b9afc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484632/normal_5ff361052c7e7.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/bvphahi/radisot.pdfIn PDF document text
    • https://rixafewokeget.weebly.com/uploads/1/3/0/7/130739987/3adf750b.pdfIn PDF document text
    • https://luwegojozokozop.weebly.com/uploads/1/3/0/9/130969796/1facc001397a10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415783/normal_6004f67283491.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447253/normal_5ff27e5463f79.pdfIn PDF document text
    • http://zifefok.22web.org/domodebadupuzute.pdfIn PDF document text
    • https://jarofuzaduse.weebly.com/uploads/1/3/4/5/134502270/movukevotuvezomafer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_600bb754c631e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zorogeloma.epizy.com/36881204138.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/2013_chevrolet_impala_lt_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/funny_kid_test_answers_pictures.pdfIn PDF document text
    • http://zopefunexot.epizy.com/38950222594.pdfIn PDF document text
    • http://venasipinizi.rf.gd/android_game_development_without_unity.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/wiredu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD328 4828 bytes
SHA-256: 8ae04a95e5a33080ece12a7537acb65fc98e07d0b3b309437e768d884514fea4
font_01_sfnt_off0000e3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 13948 bytes
SHA-256: 9cf14ba1588ee247206481184f77296d1b2e48af42dff0d5ec302a1bcad6edbc
font_02_sfnt_off00010caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAA 16316 bytes
SHA-256: cdb24ecf75c5950f210207c3afbc4611dcb441160ed4b8e571ca3ec5a7939a15
font_03_sfnt_off00012259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12259 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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