Malicious PDF — malware analysis report

Static analysis result for SHA-256 0074feabafdedc44…

MALICIOUS

PDF

86.6 KB Created: 2021-07-14 06:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 59cfd762128865810fc2a23e52a39abd SHA-1: e47038865fe530635615a5595cd135c52f88543d SHA-256: 0074feabafdedc441a9dc9d8be88f2b880552666984955bc823743da82199642
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to redirect users, with ClamAV and ML classifiers flagging it as malicious phishing content. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to distribute malicious links or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crewmak.ru/uplcv?utm_term=permutation+and+combination+questions+and+answers+pdf PDF link annotation
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/2j05bl3vbh08tge6cpv2tbo55c/besolu.pdfIn PDF document text
    • http://bacsiha.com/public/ckfinder/userfiles/files/lijoxivawi.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/tfdguu9klk42vgovqaj798jfk5/nusapobirijenefi.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/lcl13qpfmomdnaanormr8kmr8t/17293714788.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/lulunagav.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/lhl0sh0i4vfofbjq7kdv7rs9sm/nureronufalanozaberejepu.pdfIn PDF document text
    • http://congluc.com/upload/files/zewivumil.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/30607167661.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0ada523dc---zinegobesupiwir.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/u5n4bth65gut057ea3gfoh6rvv/58494653051.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160874385ce838---rudujimulib.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/8coomsqbfr2dlvmgpesbi26e9n/xogodikuladugefesezu.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ec44c207a9a---36639736928.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16094a1135e829---miwisasuxisoziros.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609234cf571f6---kobubabumolujororexobeka.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/75995798931.pdfIn PDF document text
    • http://nguyenquangcomputer.com/upload/ck/files/90736330229.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4833dcb18d---12097260529.pdfIn PDF document text
    • http://usmleworkout.com/files/file/20346597625.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/46093361588.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608de15cb8010---19306106601.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://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_off0000eac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC3 11208 bytes
SHA-256: 007095b8bf43b5843c76f8eed06f1214a9adc191a1f5630eb266c7249a985110
font_01_sfnt_off0001049b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049B 18256 bytes
SHA-256: 18d4709d0377b264dbd264d920355925a3b7c5d805fa20990f885f6bdec62c89
font_02_sfnt_off000134c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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