Malicious PDF — malware analysis report

Static analysis result for SHA-256 baddce1e2305534a…

MALICIOUS

PDF

86.8 KB Created: 2021-07-02 07:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cbbb1565f84f6d20d834947929ec6122 SHA-1: 1ea19ef6c4045ddf261859231c27b63c3424be57 SHA-256: baddce1e2305534a160d5b1ab97a55a11693ac36bb12e3aaa0eb488f020e90a9
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to compromised CMS upload directories, suggesting a link farm or phishing lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/a01ae06c994cfa039409549f2e5648db/gopikad.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/sd3hbknh18e04cgplk7idda610/zusiloxude.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7c5c82609---28477213423.pdf
    • https://grupahatak.pl/admin/_fck_files/file/83209952577.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0c4cac463---bezedijiwurinujebisex.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/2jbanb2j4n4n4ug13vhuf84793/58158659113.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/bc9cddd39d345ba7ae192601b68dd986/silanenixafivapiv.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e2fd7eae4---14898061260.pdf
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/9065406689.pdf
    • https://navliecky.net/userfiles/file/peluvalikagudus.pdf
    • http://txextremecarts.com/userfiles/file/deninozolujawimuledisovu.pdf
    • http://hydrem.ru/images/file/jenivujufekabexatidifafev.pdf
    • https://towa-aaa.jp/userfiles/file/33238125729.pdf
    • http://alnoorcity.com/userfiles/file/pezolilujupupojizuk.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/16cf3909db980d7fe645b764e543fb7b/gisuxefowaxagiri.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cda960684bb---vilafimumuluxumunuzofukup.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077ff522a006---guvuk.pdf
    • http://biosurfest.com/userfiles/files/poregatumezujofoberamam.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e3541ea7a---93239594285.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d813d712119---dasozax.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/9nu6pmb0971mpgsb8vs5k25fp3/70976820960.pdf
    • https://bdaudit.ro/userfiles/file/ruzamefevemipotonijodib.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/css6nffn0rg491486s61u6e585/zoxulupigadijosarifo.pdf
    • http://alarcon-v.com/editor_upload_image/file/15195326135.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a96e71cf054---30251324716.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=albinism+is+caused+by
    • 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_off0000ef5a.bin
e0deb8fabf3ec62dbdc8ae499e2a6a5e94af0fee135efa7d82dda5ddec600af6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 10548 bytes
font_01_sfnt_off0001075e.bin
036cc163837c9ae69c9d63942dd7a3b55acc8c9392b39fd1db245c3534e7123b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1075E 17752 bytes
font_02_sfnt_off000135cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x135CC 16792 bytes