Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa115e4e503c576…

MALICIOUS

PDF

84.7 KB Created: 2021-06-27 18:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25dbd3fad933abec4932613963ff9c6c SHA-1: a87c8f87f90f86d5a5b34470e92c8044f212e6a1 SHA-256: 7aa115e4e503c57694d3973d514384a803be13f2d1aa72900e0bf9be82c43550
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to compromised CMS upload directories. These links are likely intended to lure users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pistant.ru/uplcv?utm_term=warnerwoods+company+uses+a+perpetual
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf9c23900ac---68131146638.pdf
    • http://santeh.md/img/files/40799416242.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/6e1539f2e1246b1fbd823c62c522f87a/faleniradunazifeba.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ac4363024---21501548688.pdf
    • http://igigeothermal.jp/userfiles/file/95611733047.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/ec0ed0bd2142bf3202a1a451c6f0e292/sebijopavo.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae34b4659b4---xozogudaf.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ac48bb31d82---34395453582.pdf
    • http://tele-video.ru/upload/files/3918963440.pdf
    • https://legouic-peinture.fr/userfiles/file/52118953239.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/ee51ad91d4110cb4bde946a7cee04423/tigam.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7f7412ba8a---kakedagizozorode.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d5057d7ad---72492163972.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ck73ase6jnja247qm0mmr5u1u3/poxurakuvodejufilowewe.pdf
    • http://industrialdevices.in/uploads/56079242470.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d08e700e7---xadixuxoworekatiki.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5ef5615a2---70576301321.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160922bfd4b144---vulawikaxuvekenizibabove.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce747d9a03---minilakepovidumepex.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/00313d3fb34da1cf44e40f896f36eb28/30040481901.pdf
    • https://drsubhashawale.com/ckfinder/userfiles/files/numixomebetezejufepe.pdf
    • http://phuocthuan.vn/images/pic/file/87825277339.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qkhdfsi6i2j6peeatpa6dc8jf6/jasajotejijudotasegetafi.pdf
    • 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_off0000e715.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE715 16792 bytes
font_01_sfnt_off0000ff27.bin
73f1df40759f38e98613a3c14bcf41ab285555464837e52dbaf015a23551ef58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF27 17296 bytes
font_02_sfnt_off00012c65.bin
bbd1b7839e4ad2201817b769fbf67a7e4d666209036c5f9ff580a3738350ef1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C65 10876 bytes

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