Malicious PDF — malware analysis report

Static analysis result for SHA-256 1540fbdb8e2cc0a7…

MALICIOUS

PDF

495.6 KB Created: 2021-02-14 02:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 80fd3c27557707076b1a7f08ba4a1ebe SHA-1: 84b0b510aae7840e3420a96fae6e08f3eb8e34d6 SHA-256: 1540fbdb8e2cc0a7021b9548de62a9f651c9aa0a425741b36d21962aac3b1394
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to medical guidelines, which is a common tactic for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9210

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/aws?utm_term=aha+guidelines+atrial+septal+defect PDF link annotation
    • http://podjem2.club/my_dog_is_staring_at_nothing_and_sha4lelh.pdfIn PDF document text
    • http://20970907.net/fejofixawepo42ga4.pdfIn PDF document text
    • http://peskomment.ru/astrology_for_beginners_bv_raman_free_downloadrgcgi.pdfIn PDF document text
    • http://ital-tess.space/hp_laserjet_pro_400_m401d_specifications1i4vx.pdfIn PDF document text
    • https://donasidavojixa.weebly.com/uploads/1/3/4/4/134494786/xikomiz_fibaga.pdfIn PDF document text
    • http://grusha.space/histological_staining_lab_reportjur6g.pdfIn PDF document text
    • http://uuuuull.space/97672851746ykpbf.pdfIn PDF document text
    • https://cdn.sqhk.co/gomurabog/cheruhe/vuvotixofizito.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/wYyhgdS/best_slasher_finishing_badges_2k21.pdfIn PDF document text
    • https://cdn.sqhk.co/dobexesi/XJpddyQ/vector2_normalize_godot.pdfIn PDF document text
    • http://fito4ka.xyz/71952374039mdnbi.pdfIn PDF document text
    • http://dkshlyap.ru/858044190762jehk.pdfIn PDF document text
    • https://magijomolalol.weebly.com/uploads/1/3/1/4/131437319/mapepi-denet.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/gurupixabogivaz/93345993804.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/sefuloxizinulafap.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/spider_man_3_ppsspp_cheats.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/anime_movies_english_dubbed_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/vorawezivinaz.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_off000768a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x768A5 5408 bytes
SHA-256: a90f630012f4ccb5ff7133c7a3d92dafb8875a79c4a28fa9e47740417d1ca4f0
font_01_sfnt_off00077b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B07 15908 bytes
SHA-256: ed2f6be062a96eef6ef9cfb3f753f4a3e2f9ae1c1104b487a88ed9e1d6eb0df8

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