Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee6e1e22bb22a77…

MALICIOUS

PDF

121.8 KB Created: 2021-01-29 11:13:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7e777bff7971bb7ec2fede647e10f032 SHA-1: a0ec116b1932f0eda23df988a6f39de893e1e2fd SHA-256: 7ee6e1e22bb22a776101847a79ca8fe6e7153e3fec1be419551f59229586a662
146 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to disposable domains and link farms, indicating a strong intent to redirect users to potentially harmful sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, suggesting the document is designed to host many links on low-reputation infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://maypoin.ru/aws?utm_term=manual+digital+cd+press+clasa+5+informatica PDF link annotation
    • http://giveaway2020.info/wabumitanubahru9g.pdfIn PDF document text
    • http://helpcontactform.com/trending_hashtags_instagram_musico1g1z.pdfIn PDF document text
    • https://cdn.sqhk.co/tefupudoma/fDgeV9S/77352756248.pdfIn PDF document text
    • https://cdn.sqhk.co/bofozuto/Hpiijen/43052956825.pdfIn PDF document text
    • http://onlinekartiadesi.com/52832931987acvkz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369506/normal_5fc6925d5c2a9.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/6NLeVjJ/small_business_plan_example_australia.pdfIn PDF document text
    • http://love-cosmetics.shop/29565376080szzzg.pdfIn PDF document text
    • http://merovew.xyz/51887991322rkc7t.pdfIn PDF document text
    • http://goodik.fun/rezegunukidonivib7nf4.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/Qhajhhc/black_boy_twist_hairstyles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5fd9893f21712.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385614/normal_5fc6429166275.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367275/normal_5ffc9a71b366a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vofiwevo.epizy.com/nirozazojuxejejikegekamu.pdfIn PDF document text
    • http://mukesijurifa.epizy.com/94377568701.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B2F 5604 bytes
SHA-256: 15ca0189bf122d7d2db9f246a3fd8eef7d24de7569f9a6e2c71acaf2f69ee540
font_01_sfnt_off00018e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E41 18408 bytes
SHA-256: 6dd88f26a8cc0d1d8dee7f9488b8870b9ef11f04e377cbc78eac0119a1e0ccf9
font_02_sfnt_off0001c39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C39C 16344 bytes
SHA-256: ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190

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