Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1565d179da99f13…

MALICIOUS

PDF

81.2 KB Created: 2021-06-25 13:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5e501f19cac0313109a20d7d785a7a0 SHA-1: 5e03ef40842c1d0f9f8a604e0f5558ed23e0a9e1 SHA-256: d1565d179da99f1338113669881ed41d8e1b148e3db99ec5be55f298b0b2c244
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely serve as lures to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://garglob.ru/uplcv?utm_term=taking+valium+with+alcohol
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/4254184d2ab45c7ac92bc23ba8bfb7bb/buzizanakezare.pdf
    • http://standrewsparishhighschoolclassof1964.com/clients/70428/File/lebezaledupelewagaxeluka.pdf
    • https://daaeportrett.no/upload/file/48670944970.pdf
    • http://accessiblevehicleservices.com/userfiles/file/zizimoxurebe.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082622d4b61d---migaxedakaridegorujanun.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b2729593a42f003db3073f7d4a7cd046/fozajajisotokajirugo.pdf
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/bijozesokaniraputemoxi.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f7ea1e55a---bajavululovifumetosok.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ad23983de---80830722521.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/b32485e61a6ea2c8c1e5f32d261f75bf/65158313340.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/8cd71bd61380c900ef2224ca4d31e774/fusixapixapuxivek.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/b82eaaa6a6001d65e7fdd33f24890c9f/71956890047.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160961516d1434---xugegaxamogizav.pdf
    • https://drrajanmahtani.com/userfiles/files/85796221617.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e78731f0f41464f7571166c14e99ef88/xaliwufakidexuxulelogij.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_off0000dd7e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7E 16792 bytes
font_01_sfnt_off0000f595.bin
089a6908d9c76afd6a156b98c1835b5654f3b0dbd6abb9dfeac5bf6436d69bcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF595 10584 bytes
font_02_sfnt_off00010d9d.bin
418dcce860214536dcba0befcbe8415dbb34db670725f5c1d08a9d7474d19f8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9D 16448 bytes

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