Malicious PDF — malware analysis report

Static analysis result for SHA-256 165c206a1abb9a6a…

MALICIOUS

PDF

187.2 KB Created: 2021-02-10 05:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1fc2ac376006cb55ab71832dc3847c49 SHA-1: 7fc227b80395114141a37f382de91e2cd82dd7c4 SHA-256: 165c206a1abb9a6afc94541efeaf8929e9af702968df9dcac206a6db1f83c53e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV and an ML classifier, with high-confidence heuristics indicating it's a phishing lure. The document body, though heavily obfuscated, contains text fragments and metadata suggesting a callback or phishing pretext. The presence of external URIs, particularly the redirector link, strongly suggests an attempt to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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) or Microsoft license-boilerplate 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://druttle.ru/123?utm_term=aa+phone+meetings+sunday PDF link annotation
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/6600063.pdfIn PDF document text
    • http://lnstagramsecurity.net/canonical_form_marriage_catholic_church29vp2.pdfIn PDF document text
    • http://wide-take.top/baby_saying_first_words_meme_templatewoi0c.pdfIn PDF document text
    • https://kolukofutire.weebly.com/uploads/1/3/0/7/130740340/wisufa_damitubun_rapux_renagolasogaxil.pdfIn PDF document text
    • http://premiumpornclips.com/kabubogizb9jo.pdfIn PDF document text
    • https://rasazumeg.weebly.com/uploads/1/3/1/4/131454762/nigisotadidunud.pdfIn PDF document text
    • https://biwakegexenulu.weebly.com/uploads/1/3/4/4/134437141/labude.pdfIn PDF document text
    • http://idealica-italy.site/4224275699514770.pdfIn PDF document text
    • https://buxomajuse.weebly.com/uploads/1/3/4/5/134588570/4b4ca7ac58fb1a1.pdfIn PDF document text
    • http://csxmoney.info/gravity_sky_lounge_kota_makassar_sulawesi_selatanljdbo.pdfIn PDF document text
    • http://repair-planshetov.ru/the_investment_answerflhik.pdfIn PDF document text
    • http://cardioactiveuficiale.site/xowepoz4pnf5.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/juvosi/monurogutowujedowexaludar.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/cg_police_si_admit_card.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/zumumozatiwodoj.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/iris_bulbs_planting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/love_whatsapp_status_telugu.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28235 5336 bytes
SHA-256: f4968093b52c81d38fd119f5d7e21eebd7e58124e5a47984f1efd1b0afaadee7
font_01_sfnt_off00029441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29441 12544 bytes
SHA-256: d0496573254a5a3de4f25f389833285155d29853f0149a4c995f134636a9cf4a
font_02_sfnt_off0002bec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BEC4 19652 bytes
SHA-256: 0681023bf8b65ac964b689f95b41ff12a230f9f8a061fed9e7025d8ef455b2be

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