Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a936b2647ffa25…

MALICIOUS

PDF

76.1 KB Created: 2021-02-06 20:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 77ba4c475b09c58e9952c92642ec9670 SHA-1: 3154fed0294e28b338e06700094616e9c2506116 SHA-256: b4a936b2647ffa25a72fd17331ae2aff2909fec2f02e8fb7b89703439d1e06d1
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://baarspo.ru/123?utm_term=program+att+uverse+remote+s30-s1b PDF link annotation
    • https://dopotalufiru.weebly.com/uploads/1/3/4/6/134601398/kagoxemiva-guritorabemulen.pdfIn PDF document text
    • https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/perem-timukadi-guropago.pdfIn PDF document text
    • https://jikowizovogowo.weebly.com/uploads/1/3/2/6/132682153/22230c85738608.pdfIn PDF document text
    • https://pasojifet.weebly.com/uploads/1/3/0/7/130776368/remojuz.pdfIn PDF document text
    • https://popewike.weebly.com/uploads/1/3/1/4/131407195/tuxagebenimavuk.pdfIn PDF document text
    • https://banukusisazej.weebly.com/uploads/1/3/4/8/134893357/bifuzijakotujaf.pdfIn PDF document text
    • http://nuwikivetajed.iblogger.org/joseporixatox.pdfIn PDF document text
    • https://nuvusutapisi.weebly.com/uploads/1/3/4/4/134460305/juvukib_wukunij.pdfIn PDF document text
    • https://gebekogekikak.weebly.com/uploads/1/3/4/6/134694855/nojetojo.pdfIn PDF document text
    • https://xixefofitajeres.weebly.com/uploads/1/3/3/9/133999179/nevufoxixi.pdfIn PDF document text
    • http://xubakonuxejebip.iblogger.org/domesuneti.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/pevuwarobuvowa/fenifuxasiveposopexixi.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/guider_meaning_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/school_letterhead_format.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/rizipolokabu.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_off0000ec17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 5564 bytes
SHA-256: ba0b2d5f106a62dbff4fff19f2b40da62a8bc1cb9792f51068f9492cf5c0385e
font_01_sfnt_off0000fefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFA 10656 bytes
SHA-256: aec6c8c2848dd8e2296aca77b3dd9cdaa60ce9c20f0a3de423c5b5af11ea723d

Open this report in the interactive analyzer, or submit your own file for analysis.