Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a890c290b4bb9c9…

MALICIOUS

PDF

68.0 KB Created: 2021-09-27 07:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 014e819b1f7bb7a85a52369573b1b855 SHA-1: d45ce5f1f3446a9103992513313680454892a7fc SHA-256: 2a890c290b4bb9c925baaa37115a787249bfcb7a06eeba9776b672bc1c1630e2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an image-based screenshot designed to conceal clickable links, a common tactic for tricking users into visiting malicious sites or downloading further malware. The presence of numerous external URIs, many hosted on potentially disposable domains, reinforces the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/tudenopepilodubun.pdf In PDF document text
    • http://dansensvenner.dk/imagesfile///17328583849.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/79384575640.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/jazomaxatovo.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/zofifokej.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/96860622074.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139da262865b---gapulag.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/xojesisojefodixeru.pdfIn PDF document text
    • http://tayles.com/uploaded/53030615370.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/wobudutalosafomopefov.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210910002125.pdfIn PDF document text
    • https://rajakedua.com/contents/files/bubugerimeruvibu.pdfIn PDF document text
    • https://kiptep.ru/file/sodovuvoxijadopo.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/gamokivikexupolisazun.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/vuselokelozugavolupevore.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/pivazituzeketalov.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/78835146012.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/b5eb63d8403841e27100e1a8f1253c5f/68688051694.pdfIn PDF document text
    • http://antropolog.ru/userfiles/file/5149031805.pdfIn PDF document text
    • https://kuwaitpolyurethane.com/ckfinder/userfiles/files/32302768087.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/46678208693.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/tubalopogamido.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=nice+to+meet+you+ep+1+eng+subPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC485 10792 bytes
SHA-256: 72a65c5fe6ad2a20cac20343322fe2f1ca5fdbe170b51f9ce6069d9267a82e83
font_02_sfnt_off0000dd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD46 14452 bytes
SHA-256: 987404535d017aa36f43df19e218e0fa421724648cb82223e521e2f1b089069a