Malicious PDF — malware analysis report

Static analysis result for SHA-256 301ffa6a4e1503b3…

MALICIOUS

PDF

90.7 KB Created: 2021-06-26 00:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d695c28a9dc342274d2c63f9db5b4569 SHA-1: 7a06291957b89fc4844c5d6043284628db8715ba SHA-256: 301ffa6a4e1503b3d2c1d2e22e89c75bb60386cef4a31f4d6123cd25ffcf0aed
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a callback phishing lure further supports the assessment of a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sghscsjamarai.org/guruhargobind/userfiles/file/35407232163.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/h736tg9rncnb5mp0jhmntrg0u9/lidulemekadaxifom.pdf
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/35957392950.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16096901d02421---logum.pdf
    • http://manavpublicschool.org/manav/userfiles/file/80595439623.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec5829c0d5---megopexizebulilabi.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf486805cf3---texemavomuzefukuje.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/9iotrpv879tf2ft01624lvlsm2/mudidemevuvunajumoxiroxo.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/g6agcm2iqs5hp9hf469g1ga636/xuzil.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa65216ce25---kazak.pdf
    • https://magnettoptan.com/upload/ckfinder/files/gupok.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084a2dce3b7b---redafejewivuvamos.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/68a9897c79fe1522ee6db083c2820666/jupowiraxikujijemaxe.pdf
    • http://k-ookuma.com/js/upload/files/puxejovoxixa.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/8cq5u72fp9di6g029gphsac4o4/gikivatodugunawo.pdf
    • http://lucann.com/Upload/file/40006168639.pdf
    • http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/82123491229.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/a1077vern6c37j5p6tjf6rueml/3889691583.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607970b302633---99721632786.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/lpf24eta06llshdl778ptbf7jo/bawiwudum.pdf
    • http://cpbnatation.fr/fckeditor/userfiles/file/10690428897.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607346595c05b---rimuzosunarowelibavovew.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/7n71mkst7tqh3jg98q18sd0rbc/6602429957.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076332ebb5b2---vibemoverezegigozab.pdf
    • http://mdsalon.ru/img/lib/file/lugus.pdf
    • http://curry-box-deluxe.de/userfiles/file/bijawuwiperukituzirobaliz.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/5e76679c5a3fbf6e8c694be26d04e3f5/dazowovumom.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=gca+in+young+patients
    • 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_off0000ff29.bin
36ea890e0516746f73d4a7e3234f11db650c309869b36ee8c46108dfb012042d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 17476 bytes
font_01_sfnt_off00012cc0.bin
3c67bb4027d500566a45135248478da72cafc4023044f7ce41cf3a771ddac513		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC0 10656 bytes
font_02_sfnt_off00014562.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14562 16792 bytes

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