Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8e33db34b404bf…

MALICIOUS

PDF

59.5 KB Created: 2020-12-17 12:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b7e5d89f75db50f810c9f31a7d4ced55 SHA-1: c1526c1aff5592522f706837fd363af4266b8970 SHA-256: 9f8e33db34b404bf8438c921313b4198739da6b951e13f4138cb90a196dcbe43
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many of which point to suspicious domains, suggesting a link farm or phishing attempt. The primary malicious URL identified is trafffe.ru, which is likely used to host malicious content or redirect to further stages of an attack.

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://trafffe.ru/123?utm_term=ecological+relationships+worksheet+pogil+answer+key PDF link annotation
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/zezibexifolewifepim.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/sexuzifubalukezapa.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/xileteb-filimomixogolag-goguvigadixi.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/4177595.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/5bb68ce6943b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc56aa3ea4a794d56637c79/t/5fcc47b67ae85b53b285fa64/1607223222988/salakarigal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2f60dc-90f5-4f91-857b-9694712ed17d/37418616484.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/consumer_reports_washer_dryer_buying_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae73e76a-4a77-48d7-baa9-f975cb618abe/28211357479.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc373c8df132613bbcde1a1/t/5fcee2611b45e152edb8e127/1607393892540/baby_unicorn_wild_life_pony_horse_simulator_games.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66998d49dd124475a272a/t/5fcb93960814be4f73ebd462/1607177110704/femupimer.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/gta_5_cheats_for_android_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdec9dd16a7702df007986/t/5fce9a890b1ac23e3f0b08b5/1607375498729/pilot_flying_j_near_me_right_now.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_off0000ae0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0B 5408 bytes
SHA-256: 3042503de323701d97b9a7c52d91b458a23b742e61904be72baaa577c3b71550
font_01_sfnt_off0000c08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08B 9452 bytes
SHA-256: a74d7b7f1454bcc2a3468e6ce0a11f038fe706c63e9538f55a37df55e3fb3092

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