Malicious PDF — malware analysis report

Static analysis result for SHA-256 187cface45e7b337…

MALICIOUS

PDF

85.4 KB Created: 2021-06-29 20:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1bbb126e50b175947e9df296409eafb3 SHA-1: 119a9b73fe3e55795d2475908b661adea6c64732 SHA-256: 187cface45e7b3377b7325729f8a6a6e71273be18315d612d464bcdd8465efb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lure users to external resources.

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 http://charivne.info/images/file/ruzosazamukuvipoweni.pdf
    • https://lavaecucebrescia.it/file/39285305106.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a68d1207831---30734038540.pdf
    • http://influences-vegetales.eu/assets/Image//files/23022751581.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d52b30210e---rajubovik.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcbbe2b081---giwibuxarimudigejesiwa.pdf
    • http://saokienviet.com/uploads/image/files/xufodutulesu.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/8c30f0d2c8b38433dc33c66a8fa1f0f9/nonixapejebotagawagitazut.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/d6ff05848d1c8dee0ec4da3edd442b3e/34318456228.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/e5de58da9cc1d2d2bec8ecaad0d2266c/12086857685.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/22ba4155b6d3c04d971f5849671b63a1/66460592330.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/l1bmvma91drnab1rhd07m5ao86/17185448623.pdf
    • http://gursakaryahukuk.com/images/file/98680044937.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c677cbb0a5---sipidi.pdf
    • https://soudurelauziere.com/upload/editor/file/fefofodanopajikavaka.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/72483bbfdfe4fe7dd30e2c2d302c3664/zalelunifizurarijusunu.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072e47478b64---85939925521.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/2irbtud71gh1ufjgllh7bgnpcl/pavag.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608947e456172---75670826791.pdf
    • http://mdfgiare.com/upload/files/51437371634.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/d2svsj45me90ceocqiockk9pc1/nijipatekamipez.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d32db74ad---rowepuvowaxa.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1a3ac2472---54214407725.pdf
    • http://envigest.cz/upload/file/95668381314.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/6sp8pdegkt5j5paursfve0hs31/55777777418.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=lump+above+my+pubic+area
    • 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_off0000ed8f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 16792 bytes
font_01_sfnt_off000105a6.bin
0424c1bac582e7f9b34c655e358fa315ff2ea5455f4ef38c5adb7d046e3c4614
pdf-font-stream PDF embedded font (sfnt) at offset 0x105A6 10496 bytes
font_02_sfnt_off00011d52.bin
f5a5a506df40afaefe1ee47a21394568c72c830039a33c3857fed041c12d8400
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D52 16812 bytes