Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65816082fcc8ef1…

MALICIOUS

PDF

84.6 KB Created: 2021-07-06 02:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf48cfb0033791440f189d2ae890a678 SHA-1: 038cd5427a953ccaa08d26388cae41b70f47f3cb SHA-256: e65816082fcc8ef13b87e838baed46992da30d50fd86f1ec3d87d995dfeb541e
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it functions as an advance-fee scam, presenting language related to lotteries or parcel deliveries to entice users. The document contains numerous links to external PDFs hosted on compromised WordPress sites and other disposable domains, likely serving as a link farm to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2d40217476d7fdab36a16abaaeb7da24/pikenezanesemeronalije.pdf
    • https://alihuata.com/userfiles/file/jumugiker.pdf
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/80975334041.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094264ec85c6---ronerikuvi.pdf
    • http://miryangpension.com/FileData/ckfinder/files/20210702_7F9BCB82DA85C2E7.pdf
    • http://tele-video.ru/upload/files/71807232421.pdf
    • http://clarksville.net/wysiwygfiles/file/53462900762.pdf
    • http://szzxwx.com/Upload/Upload/file/202153178589432.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bbee54a5e64---bolixisutepomiwipaj.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d94c502fbb---62965610778.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/f57e2f3cf126bbc8b19b49ce76d8d161/78499423904.pdf
    • https://boucherienabli.com/uploads/FCK_files/file/xilarixiwikitafobudobamav.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc5e113cb9---61808185928.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/093f656c28db68779bb3d0485404c812/79474522097.pdf
    • http://www.mezmat.ru/ckfinder/userfiles/files/lexokaguroxavonovimi.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/6159ecc4c40287d2c12a7093e87df043/66896836802.pdf
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/4d84024a9379981f02d9a9a93c65b4f4/kiperegonideru.pdf
    • http://musikpark-live.de/userfiles/file/julebukemijobalijarew.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d2c3c7f18---5153969601.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0f6cc867fdcb27d1f63787925e56cc99/29459646042.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885ba241702---1730148041.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/oq9r7uduubonr5eb5j8jpgojja/dexupiva.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082eff16d9a2---vorowik.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/cf8115d5cc38302b736d9fce7f5a3b2d/fotewe.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/a2d388c4211bd2a8fe414018f6cadae8/12122669527.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/af9m2102cvq6tg304dfbcki1o7/jukidiwo.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079ea6d9b712---78204239132.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=jerk+and+gyro
    • 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_off0000e785.bin
9deba0422befd813b5e2817a2fdea3e2721f6549e0809c1545f2f30ce3b0b64b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE785 10216 bytes
font_01_sfnt_off0000fe55.bin
3348b641ba07511b785a4f9634b034bdb33e96d4c0253a9bdeb1c32116d75ac2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 17688 bytes
font_02_sfnt_off00012d24.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D24 16792 bytes