Malicious PDF — malware analysis report

Static analysis result for SHA-256 c586fa0e7ae2b013…

MALICIOUS

PDF

75.9 KB Created: 2021-02-11 06:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 22f0ada774faaf0bf2faff989c458603 SHA-1: ca8419dcf99b4d414e08b3d9387e95f5231a4fb1 SHA-256: c586fa0e7ae2b01301a81a88f635a23ee3506c9c5ff08e32903697a1216a2915
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it's designed to redirect users to malicious content or phishing sites. The ML_NYX_PDF_MALICIOUS and ClamAV detections further support its malicious nature. While no scripts were explicitly extracted, the structure and numerous external URLs point towards a phishing or malware distribution campaign.

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://jottigo.ru/123?utm_term=sig+romeo+1+battery PDF link annotation
    • https://cdn.sqhk.co/jujirepak/e6heTzM/ludo_kingtm_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421213/normal_5ffd7443b9980.pdfIn PDF document text
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/rigizeperezukeli.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/wixatuderire.pdfIn PDF document text
    • https://cdn.sqhk.co/rezeribevi/gijghni/2725240737.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472198/normal_600481d8d143d.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/595661.pdfIn PDF document text
    • https://sevisexabokiro.weebly.com/uploads/1/3/1/6/131637038/tiwutomu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369633/normal_5fddfe35b7109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5fd23fb9abd24.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/lBJvMhe/21769804207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408187/normal_5fd34e256917e.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/hhifpif/godediwatizegopufavim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386073/normal_5feb05c2785cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500447/normal_5fd1ed276235e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417306/normal_5fe3b63e0239f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_60110ffa64c22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452398/normal_5fc8147e74dbb.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://gejulakan.epizy.com/49072526493.pdfIn PDF document text
    • http://zavodopivuzaraf.epizy.com/captain_tsubasa_game_ppsspp_android.pdfIn PDF document text
    • http://nifekubipaxo.epizy.com/72086331871.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD4 4876 bytes
SHA-256: 8a603f7a344eaa8b65b8b6503ccc3cd2b586b66202fc073d311781633e1862bb
font_01_sfnt_off0000ed6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6D 11288 bytes
SHA-256: e36e51011a7d60fac9c33b4ca80a9db357633f14c7547ac9ef17f7932149f0d5
font_02_sfnt_off00011420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11420 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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