Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1d84ef49a7d7db…

MALICIOUS

PDF

89.8 KB Created: 2021-07-05 15:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 05ab7780a9c4d0062b809ab980f9119d SHA-1: aff84b1986bafcdbdd5f835868e8a9c62dc80563 SHA-256: bf1d84ef49a7d7dbf8ff2c217faf087df14ed59bb50b6993fec5f3d3df6ec889
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application T1204.002 Malicious Link

The sample is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute malicious content or phish for information. The document body, though heavily obfuscated, is consistent with lures for lottery winnings or parcel delivery scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57177720938.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/37b507d84fb4a33d112a275172ab2dc2/vesujuvakebuxaxiseruf.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/de2dfaadc39d35c84ca9927438bc0c35/doxivoxufulowuzadito.pdf
    • http://paroissedementon.fr/upload/files/23742814382.pdf
    • https://aedwea.com/upload/foto/49677583387.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/6ba4cb8825759c5d7107c15df1cfa442/35015068940.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f85ff18946---47701916410.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/t2v98tf1asd3mjs1suctbq2kfn/semalijesozaladadejoj.pdf
    • https://oddluzanie.net/userfiles/file/difobakoz.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/582ea4c350ab353aab37ef3e248d4d28/denidaziz.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772a249d9e8---67116816492.pdf
    • https://mk-sito.it/uploads/file/24629243326.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/48400f1e61bea482ead452bb449c5dc9/nikikudobereguwisole.pdf
    • https://promise-land.com/upload/file/99821076200.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c599e83fed4---51079241020.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/56f93f04e7105e8959f6514873fd7de3/sujopudemizuzital.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/93865bec6011f9dcb70c5d9176664688/paxidufisudirevagubutopus.pdf
    • https://mn-lawfirm.com/box/userfiles/file/gopoxenalufemaveg.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7d0f7705baa89adcfb6eb3747adbda46/nuzefagutudofofufamane.pdf
    • https://villatoscana-pi.it/userfiles/file/4420371959.pdf
    • http://gwtcs.org/Content/uploads/files/33687969521.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16082c40c7f2f7---62946223237.pdf
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/7824fb57c685597fcec637a8b91be598/84705501082.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079893059d94---webarimotumoj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=workcover+benefits+guide
    • 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_off0000f9a5.bin
8fe826dbb5962a60921d664f29f92899a7abd87762253c233b853a51e2c98769
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A5 10836 bytes
font_01_sfnt_off0001129c.bin
391efddf9a5e9ad4e22209665994072041fbef7d79ea75bc47692a5ded4c94f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x1129C 17492 bytes
font_02_sfnt_off00014067.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14067 16792 bytes