Malicious PDF — malware analysis report

Static analysis result for SHA-256 0532ad4a931903db…

MALICIOUS

PDF

75.1 KB Created: 2021-02-11 14:56:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cf06b6359735e3970d42906c0d82a62d SHA-1: 587720a5bd8b120926f9331f41b48628e89108a5 SHA-256: 0532ad4a931903dbcf0441210dcbc06dbcfe458c7da085cf1ca8f3aa8cad7542
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with a significant number pointing to Weebly and S3-hosted PDF files, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains keywords related to a popular game, likely used as a lure to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=pokemon+alpha+sapphire+legendary+pokemon+guide PDF link annotation
    • https://kawawipebezuvo.weebly.com/uploads/1/3/1/4/131409621/fibifes-puvejexalesop-sadusolojop.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/jerebuwoxuruj_tefewifunajoliz_kadomovefonimug.pdfIn PDF document text
    • https://tabuwesajusa.weebly.com/uploads/1/3/1/8/131856124/2115081.pdfIn PDF document text
    • http://limons.space/94248442570u38f1.pdfIn PDF document text
    • http://skidki-day.shop/red_dead_2_fencevddex.pdfIn PDF document text
    • http://aydym.club/763487591399u7f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5ff8cd5015e62.pdfIn PDF document text
    • http://1cats.space/maplestory_kanna_meso_farming_guide_2020drd0e.pdfIn PDF document text
    • https://satewode.weebly.com/uploads/1/3/1/4/131407014/2928852.pdfIn PDF document text
    • https://vetolotex.weebly.com/uploads/1/3/1/3/131379132/2738207.pdfIn PDF document text
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/robupesufuwaxu-xevanozigub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5fd92f02d9b87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/voxorosefezowakamumitul.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/juwug.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/gujibik.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/38621590986.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/fondant_rose_cutter_template.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_off0000ea25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 5540 bytes
SHA-256: edfba60ee8d15167e94b24afa91e8e309cb99f742768be541cb41fa7accd97a3
font_01_sfnt_off0000fcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDA 9972 bytes
SHA-256: 5f5a48c67b73300258d9eeed361f6d4d6decae81e0ed88f7a113e8f4bd827786

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