Malicious PDF — malware analysis report

Static analysis result for SHA-256 886be666f32b8eb2…

MALICIOUS

PDF

108.6 KB Created: 2021-07-03 00:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ffcd18fb7b06e13c5620bf1b14660c14 SHA-1: 53856fd4ad75876496a98d70d9558953e2b5007a SHA-256: 886be666f32b8eb24adf60e90f5bddc0db4e6efa40c6d3578456bfa670590602
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous links, many of which point to compromised CMS upload directories or disposable domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • 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.
  • 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://beastyenergy.com/userfiles/file/87936547933.pdf
    • https://simondaulte.com/ckfinder/userfiles/files/jitazewosonited.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095cb6a54aff---popomef.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607581859cb1b---jegubekim.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070301f627b1---vepulipizuwewadesaxa.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/oeqg1u9chv3dan795kknvsn2lh/45517546384.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c581e50c836---239923402.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e76826b08d---samibejimigupuzebupatagi.pdf
    • http://messtores.ca/fck_user_files/file/vojedogibe.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847f706ec54---didobipopil.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/14eb1c679444602c0dd870fa4c3a588f/polavinofiveloje.pdf
    • https://systematix.pl/userfiles/file/xixapifowet.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081849dac0d2---xasaxeliwiwupogukidi.pdf
    • http://cokhihoaiduc.com/uploads/files/tadoto.pdf
    • https://tortugafilms.ca/adminfiles/file/topud.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/bbe6421936852473428187b528e52b87/4250831544.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d9b00ee0b---mizixurere.pdf
    • http://pusheng168.com/uploadfiles/20210624210014.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3bd70f748---taxupemixezegorekil.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d09e156b59b---37270202342.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/d37e273402a9f7e862d387743c5482f9/bapiwusa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=scripture+the+weapons+of+our+warfare
    • 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_off00014634.bin
0aefb7b3890e8a2ebd4063bbcec96a45d80406e44fa2d955717ae3bb02d08b09
pdf-font-stream PDF embedded font (sfnt) at offset 0x14634 17192 bytes
font_01_sfnt_off0001729f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1729F 16792 bytes
font_02_sfnt_off00018ab6.bin
c415bb843b241c7d193ebead298e00ef14ed836031951da5a8ad1c883e4a19a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x18AB6 10792 bytes