Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba79ec96c9f2efdf…

MALICIOUS

PDF

89.5 KB Created: 2021-06-25 21:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8fe501cb6f7c26c9629cc9d885339bc7 SHA-1: 1dc9c7180fb88511fb5735ca160370c946358754 SHA-256: ba79ec96c9f2efdf775323007dff3c88e517242c54fa63a3a8800f446e802254
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, directing users to multiple compromised websites, likely to host further malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics suggest an attempt to lure users into clicking malicious links, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fd07d1f2a---90411841685.pdf
    • https://apsco.ly/userfiles/files/zulosumi.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/u6m8p417looisukma362f6i08v/66288248231.pdf
    • https://gs-hemeringen.de/ablage/userfiles/files/fegigujenunubitidusen.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afffea7b8a3---5235364363.pdf
    • http://pechati-piter.ru/userfiles/file/63893406398.pdf
    • https://myphi.biz/nbloom/fckuploads/file/xaxuzunafimefalutafunup.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/850501eb330dc65756fa941957bfd832/vidumigowipogiroxenapi.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aacc98b3562---figubosazuxixive.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/7be9df16ddd68fb2978db1923e28ee41/zesateboxofevufewapidig.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607183ce4def1---legaxuw.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/gtpt69c5qg5l0debo9gftknth3/vekemuxuwe.pdf
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210527230621.pdf
    • http://asokmontridental.com/userfiles/file/14032671976.pdf
    • http://jump360.co/upload/files/20210625215558.pdf
    • http://jfe.hk/userfiles/topidofubawufur.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/fie65m8hudv00qhqf0j7b4viug/moxinazinazutotekef.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160973478ca5b6---javozigibe.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f5bdbc5f3---worugalopamir.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fa313097c---nikufolegafenaku.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdd81b1de3---56900240439.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/uecb3ukfgvelrje7sgrs1sbdb6/jaxerasimepodawaligux.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e17a2d084d3abe25875654aedba50fa9/33173441088.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=a+trademark+is+registered+with+the
    • 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_off0000fab5.bin
ad8b5dc29228ac2e2ab209594110a4d4d712827a43e35d868c400e6eb0e145f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB5 17648 bytes
font_01_sfnt_off000128cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x128CB 16792 bytes
font_02_sfnt_off000140e2.bin
27f70d996aae5d9d9d52cacf773a5fb8f581a24fbe78fc8fd228569d95c518e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x140E2 10584 bytes