Malicious PDF — malware analysis report

Static analysis result for SHA-256 61607b659cba8b54…

MALICIOUS

PDF

103.9 KB Created: 2021-03-24 12:37:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b127f914473274b456c8a462169b31a8 SHA-1: 91b2486ed2ec778ae86eede3773448507b9b0080 SHA-256: 61607b659cba8b54dc110effe97f9dd0005e65e98e360dc26de59db44d413fb1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://baarspo.ru/strik?utm_term=panasonic+genius+prestige+plus+inverter+microwave+manual', is suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/strik?utm_term=panasonic+genius+prestige+plus+inverter+microwave+manual PDF link annotation
    • http://prodson.space/233652168309a933.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384831/normal_5ff2e29203b85.pdfIn PDF document text
    • http://iclod.tech/why_are_my_keyboard_lights_not_working_mac6gwz9.pdfIn PDF document text
    • http://copyright-supporthelp.com/koretoxanivclb31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467030/normal_604885e5c53dd.pdfIn PDF document text
    • http://swiss-gear.shop/mitsubishi_plc_programming_booksone8u.pdfIn PDF document text
    • http://gopagafab.medianewsonline.com/remove_watermark_expert.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/green_day_holiday_drum_sheet_music76uv5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_60176c1ea6d4b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9fd4a267-a675-4462-b2a8-34848e7262be.filesusr.com/ugd/3835dd_ec848d75ec5e477c8f656f588ec1ded3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tudawufed/britannica_world_atlas.pdfIn PDF document text
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_83393c966e8049708b772b408773c1b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/neviwove/health_assessment_form_nursing.pdfIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_bf33bb2968f147c4a81a61bddbbf6e81.pdf?index=trueIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_68baf894dd6c45c6b4b14a0f1f2b3719.pdf?index=trueIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_f6b558ef4fb645e786a49e5371de464d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daselex/black_batman_wallpaper.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/gelila.pdfIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_0fadb521797f4733ae81505a99b602c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rirusozo/tupawokeduruvevexun.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/bexadelewizarexopovodu.pdfIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_7d5883fbad854b8cb63c55a8606b436c.pdf?index=trueIn PDF document text
    • https://bea00909-aa88-4d38-ac88-e56db460b486.filesusr.com/ugd/923104_41f17ccc73d24a87bad70a8a07562bb9.pdf?index=trueIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_ef168f70da75404fbd518399119756d5.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000141dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141DD 5408 bytes
SHA-256: b6750f088ee157a409332449432a75a63a8d40abd71c834ac84920c2e39213b2
font_01_sfnt_off00015440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15440 11044 bytes
SHA-256: 04a65002e429bc0fff9271d4fdc68eebcccf11229e05ee7a2c39b2210f9ecb22
font_02_sfnt_off00017a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A21 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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