Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ef262a78ca9c43…

MALICIOUS

PDF

77.0 KB Created: 2021-06-29 05:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c3a07e812d3f95aa6999de220deeddc SHA-1: c74153c4276ddea1d7d54dcddf3c13631a540e91 SHA-256: 98ef262a78ca9c436367e9f45352337a17d0a1f53ce50a1ccdffb75df0195923
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 http://amandamaitland.com/images/file/gazitifesidexanafixugozo.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d1def69d9a2---53993539915.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607506c843a51---vuvegow.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075e91e8ce2a---buxobujosetaputenuz.pdf
    • http://al-farh-iq.com/upload/userfiles/file/48664755889.pdf
    • https://taevlingar.se/images/pages/file/97711737967.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/f6193765b6066368cacebba70a5fdd69/kekowonetojadidazuvaderan.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe3fd6f10b---44341278938.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2925ded0a7---pelivarebibabapemidebo.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/c8d675d4b096594e333989a23cf19f2f/18522745287.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/06d5f6ba38ac80614a40b69b97685abf/65878180258.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/psrv07rfuo3gs015j50vq6itml/sojeditafizozovebino.pdf
    • http://pekingtogo.com/uploads/files/44297080615.pdf
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/zovobezabo.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/sobote.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f40970ef44---77841901799.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/2bjsrad5st56svoc2rb32286pa/83270865479.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/omtd0bah1adr2n02rv4kt43aku/54008856560.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3cae17844---88669123244.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/2uolqjm60ba3k79iaocq3720an/mufupu.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/a5frcrloi8fq23kpe5226imot3/jonoziputuxifoxujojaf.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/4c0bbc4341de87ca144314952a026350/bibegefalag.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/1c0687681a1aa598099c84c49d3b2540/5490362000.pdf
    • http://kpotplace.com/uploads/files/waforenowejilalawimel.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/27cced889d4e3767f6763874f976f3a5/14171315134.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/94036ec8da91d332b99a06802a2acdb1/86849644579.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=worksheet+kinetic+and+potential+energy+problems+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CC 16792 bytes
font_01_sfnt_off0000dcde.bin
23c2b4a09bf0db6b039e7f535b05efa04227fcd720c174dd2125821ef54ce709
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDE 17108 bytes
font_02_sfnt_off000109e7.bin
1c9d84c7fedb03b95617812f038bcf04fa99f516c0dfb8f8def04dc9228112de
pdf-font-stream PDF embedded font (sfnt) at offset 0x109E7 11388 bytes