Malicious PDF — malware analysis report

Static analysis result for SHA-256 0399caf9b1e73e9a…

MALICIOUS

PDF

91.1 KB Created: 2021-06-30 15:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9539b69ce6fd98a7990743731d9b6c13 SHA-1: be84219993b9741235bc70fee4dd931dfea572c5 SHA-256: 0399caf9b1e73e9a5158bb4cc355356272faec988489c21781c4cbd385f60dbf
196 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, with heuristics indicating it is an advance-fee scam lure. It contains a link farm pointing to multiple PDF files hosted on compromised CMS upload directories and disposable hosting, suggesting an attempt to distribute malicious content. The document body was unreadable, but the heuristics strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://beerskiboot.com/img/upload/file/sufarategipi.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/e4b13737775c256144e60b118da2c16b/namopi.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/q6v0uuig8ssjs3jqj90kncq637/fenipot.pdf
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/55576280040.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609859be70a97---lekejibinamofuzoniba.pdf
    • https://aawyx.com/sites/default/imageuser/file/70675651939.pdf
    • http://pwmtqatar.net/userfiles/file/dajujefojugixew.pdf
    • https://madopin.com/calisma2/files/uploads/xipuvov.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160825d67890d4---16709381220.pdf
    • http://razaviota.ir/basefile/razaviotair/files/zenomosafiwinekupuves.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160880237c0d07---jilitivi.pdf
    • http://muzeumostrowiec.pl/obrazy/file/1775213724.pdf
    • http://codemessaging.net/ckfinder/userfiles/files/56430355200.pdf
    • http://afghansolar.com/userfiles/file/murazeragutepotelovipafu.pdf
    • http://alarcon-v.com/editor_upload_image/file/wusaxo.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160961418a7aab---vusowelufefaga.pdf
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/larefugozakajulexevi.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/2lg8hrphv8rc59ijcsqkj9d8g8/92973194292.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/7467b3ffe9c34e41cd71e26893547395/50199780021.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078a629c7a37---80264366017.pdf
    • https://mps-india.com/userfiles/files/42936516540.pdf
    • http://haniltm.kr/upfiles/editor/files/todimopijedekera.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/sl67i35ccdo5nrvdh2up84l3i4/seroforusuta.pdf
    • https://parfumzone.ro/files/file/93193888767.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160add7ba5238b---38467849721.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=the+way+of+the+househusband+live+action+online
    • 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_off0000fcff.bin
0255175b758256e36a2fb764342fa65011f89b91f38df48486271bc917560a41
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFF 17752 bytes
font_01_sfnt_off00012b88.bin
26eac9eb33734431842a5c952e6f26499e367c8caa2059f95d92bbc1a8814ec4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B88 10944 bytes
font_02_sfnt_off000144f2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x144F2 16792 bytes