Malicious PDF — malware analysis report

Static analysis result for SHA-256 7add1f1e34f8fb10…

MALICIOUS

PDF

66.7 KB Created: 2020-12-04 15:03:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 55b7c331b17ca3ee63d11d1f86086590 SHA-1: 3c539a98999ae79469c657f516a46efac9a741d1 SHA-256: 7add1f1e34f8fb10c1d1f28b3c9bea0c6ecd14e644a6f3b139f030df8b08cec2
214 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, including a known malicious redirector. The heuristic firings indicate it is a malicious redirector and part of a link farm, suggesting its primary purpose is to direct users to malicious content. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://traffking.ru/strik?utm_term=lynnwood+pool+schedule+summer+2019 In PDF document text
    • https://kimulidorifuvup.weebly.com/uploads/1/3/4/8/134856260/d09c98777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_5f9a04d5c91e9.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/fakovitexagazen-nuxaliladovobos-zuxasuru-zileniwijebunab.pdfIn PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/d8da6226.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/tofinesowekakinob.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/7282265.pdfIn PDF document text
    • https://rutebamem.weebly.com/uploads/1/3/4/8/134862863/fuvimituluderosezo.pdfIn PDF document text
    • https://gulijigomun.weebly.com/uploads/1/3/4/3/134350957/160cbe37.pdfIn PDF document text
    • https://famixarusefon.weebly.com/uploads/1/3/4/3/134396739/dabibixavetunubevoki.pdfIn PDF document text
    • https://dafepigog.weebly.com/uploads/1/3/4/6/134605944/widonejafu.pdfIn PDF document text
    • https://vapesokon.weebly.com/uploads/1/3/4/3/134329795/xadaxexumometo_nojomujolizitez_zexefanekan.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
    • https://s3.amazonaws.com/zetare/43924568294.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/pdf_of_peak_by_roland_smith.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e99fa13a450babf41659/t/5fc55f66fa04221c71d3b493/1606770535730/dezowofaf.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/flute_sheet_music_star_wars.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/duvujux.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_off0000ba9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9B 5472 bytes
SHA-256: e90186c7769fd77ab8245b7cf5d568fa2ade899b66a4b5dbcfc79830b4b74e5b
font_01_sfnt_off0000cd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD19 10164 bytes
SHA-256: 358449cd6c703ccaad3ceca75a4d6c7905d447c7b27f119334988a1a1e7dcf6f
font_02_sfnt_off0000eff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF3 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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