Malicious PDF — malware analysis report

Static analysis result for SHA-256 1abafd8d2fc58158…

MALICIOUS

PDF

87.2 KB Created: 2021-06-28 17:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4702445becebe77fc69a6491acaf7df9 SHA-1: 89157a6abcf3f1838c07faf1bef9cd1d249bc07c SHA-256: 1abafd8d2fc581580e88469715f23940d5ee429418db6d7fe1a8e012e636565f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to deliver a second-stage payload or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://red-adlay.com/upload/files/47187691675.pdf
    • http://leinerpakgelatine.com/survey/userfiles/files/rubozodulanedigodek.pdf
    • http://monkey-do.net/userfiles/file/20917390964.pdf
    • http://wisdomtours.net/upload/file/kokavulerosuzenodavaravu.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/ae000ef3832e2d3cc3fbd1c483b2132d/51123038829.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/77eeb62b53a22ed2369976cbc8891a0c/75666539843.pdf
    • http://biancoacolori.it/userfiles/files/duravisot.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160969766c77f6---govowozezuluja.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/saxevuxugigetaxak.pdf
    • http://perfekttorun.pl/pliki/58094432051.pdf
    • http://rheinmotel.com/userfiles/file/96366815947.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beff5c2dfc3---vijefi.pdf
    • http://almar-bus.pl/userfiles/file/nenasanufagujate.pdf
    • https://nistd.in/userfiles/file/pimowubedamulepowubizen.pdf
    • http://www.urbanwaterways.info/files/zowuzuwikunujenuxikurim.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/745686bc54bdc0797388a20deaf9df91/baful.pdf
    • http://yaeram.com/userData/board/file/sipinakodikukumezowa.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbec761e290---89359163596.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/83c4fc56b2676fd025c56889662f0ace/pidazofukatetatosetawi.pdf
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/81359566350.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d23224e42---7912842568.pdf
    • http://ayurveda-shiatsu-nice.com/upload/files/10019837979.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/7i4ti7kcrnj2t5t861iutbv1m7/gogofuxixogulinedud.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/d268t3u05ggdmbmkt2q6glsdb0/60801761198.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897c5dd738e---wawufubokuripikedasowu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=the+fourth+kind
    • 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_off0000f15e.bin
6c1a229792d672c58e190372d7d3b840c730398ac8f680d5b57cb7cbf8a300c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF15E 17488 bytes
font_01_sfnt_off00011f4a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4A 16792 bytes
font_02_sfnt_off00013761.bin
d9b03a5e57e24f42fc618f669ba7b05d4bb1106df1272ef415028d1676c051de
pdf-font-stream PDF embedded font (sfnt) at offset 0x13761 10232 bytes