Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f917e626e7f3d7…

MALICIOUS

PDF

85.1 KB Created: 2021-06-28 14:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 218d2ff74d92ff828ae5d29a4aa32e4d SHA-1: 4cc1347809a0fcd1e465987044b52c9a6aaf17cc SHA-256: 20f917e626e7f3d7e1ef7654696246b5ec4d3635ac4c866ca6026ef503342656
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, directing users to multiple compromised websites hosting other PDFs. These linked PDFs are likely part of a phishing campaign or a malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/e2aea063c5b0c4294d3b1255e0130bc2/ketixomiwojezajitabaj.pdf
    • http://banghaija.com/userfiles/file/pixuranozuvi.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c47c1c2ef30---25781226522.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/83a1f9f8bc8d10bf6d8ca3cd777b6952/17205996423.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609d17b8e2bf0---38855522013.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/5ce94af84a1eae0bc59b0183679fbd93/biketeratiraderexowusul.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160821b7428b33---sisazelubazimaxev.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/t0qfnvfnjka39r6kfc92ov6vo5/jededigiruxosapo.pdf
    • http://lbtech.kr/upfile/files/fukogiwasipenuvoginikuvix.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/307c0c60e6af33216c6f91c156a76592/wejawupenafigon.pdf
    • http://phayaotechno.com/UserFiles/File/sowumiwuxavugo.pdf
    • https://amd-export.com/site/upload/file/xubegaxuvujeg.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac883d623c8---fuvifusivopiloso.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa6bf1fe8e---49773056194.pdf
    • http://www.urbanwaterways.info/files/xemovudejoxok.pdf
    • https://mimpiindah1.com/contents//files/57104381171.pdf
    • http://www.climatisur.com/ckfinder/userfiles/files/xiwodekenuzubunujefok.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160747930c4548---razoruvu.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/jj6jiu9gh1i4fc5ctt1ef7gq01/zerulitegosudilusot.pdf
    • http://dok-vo.ru/userfiles/file/35327711432.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/d7jp30rrc9277nlkd4jdt3he9p/ketaz.pdf
    • http://babamoleskine.com/files/file/66984820714.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b4342b744---28826102805.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071dcd35f98e---lirubesu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=types+of+social+workers
    • 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_off0000e728.bin
0da2c3862a9a68ad88c2e39c0baa2d058df429c2851e83e2534488a3ba261018
pdf-font-stream PDF embedded font (sfnt) at offset 0xE728 10528 bytes
font_01_sfnt_off0000ff58.bin
98a2bac913e35b11d34c937c697fc1a22fbf0ef82340b336cfcf8022f277c508
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF58 18732 bytes
font_02_sfnt_off00012f24.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F24 16792 bytes