Malicious PDF — malware analysis report

Static analysis result for SHA-256 e464b4d627d5503c…

MALICIOUS

PDF

64.0 KB Created: 2020-12-14 22:18:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3bc023a013cabc0616c39e0876ea1809 SHA-1: e1389a64240c292773a6023b54d67f7835b66c65 SHA-256: e464b4d627d5503c873973facef908118b552ec7a8b689d4150303bae18d5526
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is detected by ClamAV as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to Quran translations, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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://traffking.ru/aws?utm_term=al+quran+madinah+terjemahan+pdf PDF link annotation
    • https://xewoweduvaji.weebly.com/uploads/1/3/4/6/134680405/suvudimebefusuropij.pdfIn PDF document text
    • https://minufagotokuwak.weebly.com/uploads/1/3/4/4/134489045/4262964.pdfIn PDF document text
    • https://xemakoxen.weebly.com/uploads/1/3/4/3/134320116/6596089.pdfIn PDF document text
    • https://guwidavimup.weebly.com/uploads/1/3/4/8/134893931/lejolodibubom.pdfIn PDF document text
    • https://mopawikivitofa.weebly.com/uploads/1/3/4/3/134347346/8520688.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/zanumopide.pdfIn PDF document text
    • https://weragekebikibu.weebly.com/uploads/1/3/4/6/134670115/pilepivudusut_rukedoni.pdfIn PDF document text
    • https://mupififidimob.weebly.com/uploads/1/3/4/2/134234858/mofiraf-negenobefasus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b701257c-10a3-4496-a999-3ae70ac13493/94302340968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f063d324-d375-4dbb-a43c-42de47db835d/60295333209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36bd29ac-b713-4f10-ab02-e400453722bc/309893157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4b2395-8f4f-498c-9846-c5c52795709b/gufojediduzugomefozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/248cca82-0775-44b0-9a45-d00ec78cda77/tupudoxufuzifutelid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc066bd9955c744b5390948/t/5fc19d74173fb5383bdfb842/1606524277280/100_is_binary.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_off0000bc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC04 5296 bytes
SHA-256: 28e944e8041652c10bf524176558053f04be7b76c22c204af5498e83ebed85be
font_01_sfnt_off0000cddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDF 11092 bytes
SHA-256: 6577e75c91f64525921c5cf1a3401a3e5d6f61bba9549df05587ac3d50556a03

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