Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d0470c46552c65f…

MALICIOUS

PDF

90.8 KB Created: 2021-07-08 01:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ed2203124fc113502a5315f63e7f4162 SHA-1: 78568115ee746812fbb4061a9c067c46240bb117 SHA-256: 6d0470c46552c65faf24a0e6a6db9cf38ecdd79edda5e59ad535f3e789abdd0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The presence of ML and ClamAV detections strongly suggests malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://infrive.ru/uplcv?utm_term=deferred+payment+social+security
    • http://tanriovermensucat.com/uploads/genel/files/53720476783.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f07ea0bed---54951300249.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160a42025e4f93---66794874765.pdf
    • https://ceccarbotosani.ro/userfiles/file/77537180515.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/81e3a2035fd9275a32978eb43862f302/zudaja.pdf
    • http://rococosofa.com/files/files/56629539300.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/d8c6c5f52257b16a2333cdeee02e7219/jadiliduboninuzuvizopud.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c1045fdec---5964697865.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/f7e688c5d36f4872d131c43ab375b21d/mogezo.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/9e3326e08cf109207398027306ddca2b/govimi.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea2a42f974---11370731184.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/d548264ce18e0d912c162bf3cd4aeb0e/mupelawunuxuvawibude.pdf
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/pojovojesivixa.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/udmjionmmtq706iiqhavcq8jcb/35837926696.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883f3475cc1---dizozopedawudutimiluw.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/c7g9m1o8cilhj1u6kc94e2vvv4/56207921971.pdf
    • https://bursakaynak.net/userfiles/file/20227644019.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61d0be1253---94939947868.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/leji04hf9boqbfujq8fimlilau/padigofabovezo.pdf
    • http://yakutiaprime.ru/SITE/files/editor/file/nuvamonugisuxutebu.pdf
    • http://shopcloud.cloud//ckfinder/userfiles/files/2348178711.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/phejc6m2fc9eqmu8b4da5enqlk/fazumudawepipemamemi.pdf
    • 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_off0000feb4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 16792 bytes
font_01_sfnt_off000116c6.bin
2f2501eb6ab93ed775c6e6518434a01200328caa3d3226fbcde6e397ae534b19
pdf-font-stream PDF embedded font (sfnt) at offset 0x116C6 17448 bytes
font_02_sfnt_off0001449a.bin
7f3f8bab9f8bec9e2bccacfb99548c8aff05f97074bffdf9a77d5f507fd14b7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1449A 10996 bytes