Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc22ec9a94af310d…

MALICIOUS

PDF

77.4 KB Created: 2021-02-13 19:08:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: db0baa744653f529a44d03ae0ef3a199 SHA-1: b1ff213840a6941ed8ef4ce148d7c892173de112 SHA-256: bc22ec9a94af310dfa6324d15045cd8f90254dc71f570ac213add89492f955dc
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirector strategy. The primary lure appears to be related to downloading a PDF about '99 names of allah with meaning', which redirects to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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.
  • 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://seumenha.ru/123?utm_term=99+names+of+allah+with+meaning+pdf+download PDF link annotation
    • https://neseroto.weebly.com/uploads/1/3/5/3/135326238/lerudimidojo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5fc6913aad421.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481999/normal_5fc87e817d2a3.pdfIn PDF document text
    • https://mifopubulu.weebly.com/uploads/1/3/1/6/131637027/fonezufijeseduzik.pdfIn PDF document text
    • https://jibukosixej.weebly.com/uploads/1/3/4/0/134018053/bonesudu.pdfIn PDF document text
    • http://regsenatvumen.website/aorus_gaming_7_z370_manualr3fs7.pdfIn PDF document text
    • https://joxenunufob.weebly.com/uploads/1/3/1/6/131606789/ff7662493a70.pdfIn PDF document text
    • http://genemot.22web.org/28204591823.pdfIn PDF document text
    • http://kostlike.site/police_request_cctv_footage_form5ea67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473044/normal_5fc761012a8e7.pdfIn PDF document text
    • https://tisalupiruj.weebly.com/uploads/1/3/4/0/134018152/bolididinesov.pdfIn PDF document text
    • http://belkwigs.com/hodder_igcse_physics_workbook_answerf9ywn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421040/normal_5fe03ecb3db72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485318/normal_5fdd74f045ec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_60208d694dd5e.pdfIn PDF document text
    • http://jakartapro.xyz/bizipanatodefogi48gxs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423699/normal_5fcdb92580013.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407998/normal_5fe27ca5508b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sasududazo.epizy.com/64977243433.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/radial_arm_saw_safety_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/logarithms_worksheet_class_9.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/sorusijarolugumu.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_off0000ef59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 5512 bytes
SHA-256: 62673d28db4e4c19f83b89c02c6b6495b7e5d26b1c306a1197280c2a3096313a
font_01_sfnt_off0001020b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020B 11284 bytes
SHA-256: 7e27216d3d72d5959c9ab5c534b535a81f583cd8c33a36af77673eb613f60940