Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b66442e54e65f1…

MALICIOUS

PDF

161.3 KB Created: 2021-04-03 12:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a0ca68e55021583436abef22a94055f0 SHA-1: 1db40b33d649481b6c7c31b01a2a68045938d9d4 SHA-256: b7b66442e54e65f1b98c9f550b3aa6d29a6db17a29fb954b7feeed991ff782d4
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dafemum.ru/strik?utm_term=2019+tesla+model+3+long+range+awd+specs PDF link annotation
    • https://gawofatofuwe.weebly.com/uploads/1/3/1/3/131380275/zapoj.pdfIn PDF document text
    • https://futibiwis.weebly.com/uploads/1/3/1/4/131408183/9119508.pdfIn PDF document text
    • https://bitilidejiv.weebly.com/uploads/1/3/4/4/134442737/begifubuda.pdfIn PDF document text
    • https://kusejatakobex.weebly.com/uploads/1/3/1/4/131438299/dekexejivoto_zoxokogadinele_dubutetikiseg_dinijotigol.pdfIn PDF document text
    • https://tewazaxapij.weebly.com/uploads/1/3/4/8/134873756/4267086.pdfIn PDF document text
    • http://nofovukad.iblogger.org/castaner_espadrilles_size_guide.pdfIn PDF document text
    • https://susatabunek.weebly.com/uploads/1/3/2/6/132695662/gexuvolov.pdfIn PDF document text
    • http://olymp-trade.top/425303688784cf47.pdfIn PDF document text
    • http://manudagubik.22web.org/mario_vargas_llosa_libros.pdfIn PDF document text
    • http://bloomwithdeanna.com/ruzuvejubqojlp.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/mejumobiwejelowokona.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/retobifulipo/bahrain_airport_departure_information.pdfIn PDF document text
    • https://2e4d99de-9d37-4ce2-abd5-0bbccafdbe51.filesusr.com/ugd/33a2e4_578c6fd2c13a424a8a8040ef34286c2c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/97631457316.pdfIn PDF document text
    • http://digegaleviverab.rf.gd/3d_maker_for_sketchup_crack.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_09a66f84c03445b29ace03ae9cc15375.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/commando_survival_battlegrounds_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/charlie_movie_dialogue_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/diwemokobofel.pdfIn PDF document text
    • http://fasajixibapa.epizy.com/91844352157.pdfIn PDF document text
    • https://b86313a8-447b-404d-ae6d-bc69740d899e.filesusr.com/ugd/e54fc7_19a5f8b5c7584e3ba7c1f523bd4e5706.pdf?index=trueIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_49adf6fba2594d5fb0559aaa14d70852.pdf?index=trueIn PDF document text
    • https://e0271a52-a7af-48e9-8a99-924ce320ec62.filesusr.com/ugd/be5703_6b398b18ee2b45b5993758d424151471.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21544 5776 bytes
SHA-256: 49259194ec6cfc3c988511ce168fd7a46d7a23f8298fd591f0cbba4115318d36
font_01_sfnt_off000228d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x228D9 13700 bytes
SHA-256: 5585ece540d4d7d113eaa8867124574b9ae4b8582b0d19e8b701d0931f6c5ba7
font_02_sfnt_off000254fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x254FE 16152 bytes
SHA-256: 3317e6babcc0cf9b2e3a95cb89288554dc7db0363d849948bb3b8746b4fa3cab
font_03_sfnt_off00026a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26A03 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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