Malicious PDF — malware analysis report

Static analysis result for SHA-256 6167164c1b7f525f…

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 09:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d4ba2e8ac31d78804d3c4b6203f0129f SHA-1: 2784a9f746499e28a19d78208402a7267f00a6ea SHA-256: 6167164c1b7f525f273b60ff2c5b7dff610e5c16ab160879b8b8e7e025162306
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, detected as a link farm, and is flagged by ClamAV as a phishing trojan. The document body, though partially corrupted, suggests a lure related to a vehicle owner's manual. The presence of embedded URLs and the link farm heuristic indicate an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=2010+jeep+wrangler+unlimited+owners+manual PDF link annotation
    • https://vapomawuwe.weebly.com/uploads/1/3/1/3/131398268/6126339.pdfIn PDF document text
    • https://gadiziwit.weebly.com/uploads/1/3/1/4/131406086/4bba6bce243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479441/normal_5fdc0ab326be7.pdfIn PDF document text
    • http://tonevagewalilu.medianewsonline.com/jizanelifavikesajamoporo.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/muvako.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369764/normal_5fce9be177222.pdfIn PDF document text
    • http://jowopejev.22web.org/31684645731.pdfIn PDF document text
    • https://tuzuxomewe.weebly.com/uploads/1/3/4/5/134527180/tevamokafidumega.pdfIn PDF document text
    • http://wuzumixup.iblogger.org/64231393201.pdfIn PDF document text
    • https://povizizumor.weebly.com/uploads/1/3/4/6/134636509/gularodaf-zufas.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/9824857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489245/normal_6020c0de80c82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jifimurosesapu.atwebpages.com/bopitisepapipoxozawap.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/lung_cancer_guidelines_australia.pdfIn PDF document text
    • http://pamakejexo.epizy.com/nowaniretibedug.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/2014_bmw_x1_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/54142497954.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/simple_html_templates_for_email.pdfIn PDF document text
    • http://patitoledoboj.rf.gd/equivalent_fractions_using_fraction_bars_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/53520331299.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DE 5680 bytes
SHA-256: 0817500d105b313e17c40712fbee2bd37891c02e901e9d91b30b88ff56347301
font_01_sfnt_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 10748 bytes
SHA-256: 853a9896a867c7d34b0fb111884ea6fc137ca62f9dfabea8cf532e5dca8891cf

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