Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7364fd1c47c119…

MALICIOUS

PDF

70.9 KB Created: 2021-03-16 01:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5b4adb340731a35966defc1c2475a2f5 SHA-1: a1cdd7a4c591df7265d6d21a1c14caf0180f2cc9 SHA-256: fa7364fd1c47c1198a8367d05896fe537e62c732309bf49dc16ae4ec1ad6c767
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple suspicious links, including one that is invisible and points to a domain designed to mimic a legitimate service. The presence of these lures suggests a phishing or social engineering attack aimed at tricking users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/strik?utm_term=safety+1st+thermometer+th074 PDF link annotation
    • http://neuroncraft.online/netacad_chapter_5_answers_20175eyzm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_6036a6ba599e3.pdfIn PDF document text
    • https://kirimanadawa.weebly.com/uploads/1/3/4/3/134383910/eb6d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393016/normal_5fc829a560f42.pdfIn PDF document text
    • https://guxitodek.weebly.com/uploads/1/3/1/6/131637279/penavirixubej.pdfIn PDF document text
    • http://lnstagram-support.live/viripurabuz3c9c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_5fd7e6852f0fb.pdfIn PDF document text
    • http://luminar3-download.xyz/maya_bouncing_ball_animation_tutorialwu1vf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_5fe961a91ec71.pdfIn PDF document text
    • http://xubaseki.iblogger.org/22304230799.pdfIn PDF document text
    • https://bipinudaw.weebly.com/uploads/1/3/4/7/134718108/73a312514.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370053/normal_5fc6b6c34bf29.pdfIn PDF document text
    • http://true-board1.club/tuxofidiximitinrizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_6010ab8f9f9cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_00afeecb3d9242248233cdd32b7e037d.pdf?index=trueIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_c97e1a542b1d4381bd71e9165ef17034.pdf?index=trueIn PDF document text
    • https://6cabd977-7569-47b8-b834-fc65c40fd214.filesusr.com/ugd/84a5c6_db1eecb9aa1c48e8afc1f4d812c68f1f.pdf?index=trueIn PDF document text
    • http://zerekigukazaja.epizy.com/tawabakikaporejafinoli.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_off0000d67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 5540 bytes
SHA-256: eabb009d58ec0b1a5b3e476e42d1ad8281f50e17bb08d2909af621ac0536328c
font_01_sfnt_off0000e945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE945 11140 bytes
SHA-256: 585045a42ff6bb2016e0a8e27efbdd7f0dbabf6cd161e9e6a83a69cde13f2743

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