Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1efe9c12d2eff04…

MALICIOUS

PDF

70.3 KB Created: 2021-06-28 07:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5846e8b67814e7d15258194a956d074f SHA-1: 5ec59379662b9b70932b3d4cc2a633324ea2b70d SHA-256: a1efe9c12d2eff047e6314ba9ebd787c33b361c9e62e71a92577fddd6474d3d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to redirect users to phishing sites or download further malware. No scripts were extracted, but the structure suggests it's designed to exploit user interaction with embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ggmoh5lda0nr6hv15ag5d4o2n7/bolunetuwuderig.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/po1v9nkkdcp9e9h6ors74uh8hf/41382567551.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/855647ddf4fb83a7861cf036703c3a88/77058750731.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/0eeb53f2630429784324892e89091ecc/933606162.pdf
    • http://amexeuro.com/an3_Uploads/file/60945078312.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609d93551f165---wepozenafilol.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d9320051ebf---19137807260.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/b364e5d1282b7dfd18edc920cc980194/vijuliz.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e5738d125a804c3ec38fb1a16e3067a0/nudofinarepaten.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/6ae747150a52cb44ad45f4d7dbca35ee/bemukerezopisulum.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/ee99c4b891a72152dd41d675f85b81ad/89118689540.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/7233facc96ae861a6e6a26aaed92a76c/jikasajaximitareb.pdf
    • http://naturallabs.fr/userfiles/file/tabid.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a524d7e0677---rapoziwaf.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092dd31e58cc---57602040282.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9ac0f79904ac9e9df95d5d6c873f11df/gonasetux.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16079d86f94747---49875156422.pdf
    • http://buergerforum-tirol.at/file/jonijonodeteva.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/b8707490cd3d03905be5cb52df25acd4/65923427996.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a35ea15432e---fuweposojutatil.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac48f0d1490---66188777024.pdf
    • https://szud94.hu/img/sajatfile/files/78102118385.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ad325d9e1---barujowijapezomuzir.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5efd447dc6---tidavilugum.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/f6c131bd1f34f0de245e7ca18bc1a246/jamuruxem.pdf
    • http://mesamiesdallas.org/clients/e/ee/ee8f1390623de39be1ac2b47a321719d/File/21943098965.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/e4i4ba9tqni4mqpbhstoij1cn7/94532216271.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=thoughts+on+beauty
    • 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_off0000b830.bin
a34bb3db821867698dea47ee6e908819378ec2f169e78a95a4b3ff5a04e2aff2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB830 14456 bytes
font_01_sfnt_off0000dc20.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC20 16792 bytes
font_02_sfnt_off0000f437.bin
674e45ab81ffc8900db7a7ba0c99439746a7826999faba0cc289d59d068a68c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF437 10468 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.