Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e6039554f4fc6c…

MALICIOUS

PDF

82.6 KB Created: 2021-03-15 04:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3936f9dcf7fcb6d47377f7056555d9be SHA-1: 0df7ba997a6364e698401188ccb695204717f1aa SHA-256: 22e6039554f4fc6c89d9675711b318bc7cbab64b8127fd0e0fb864c4c5e146a5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a deceptive title and numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of embedded URLs and the overall structure point towards a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/wix?keyword=find+local+women%2527s+refuge PDF link annotation
    • https://bufibetotireguk.weebly.com/uploads/1/3/0/7/130739935/regoju.pdfIn PDF document text
    • https://talaxosukizarom.weebly.com/uploads/1/3/0/7/130775084/lufodetisivijimadel.pdfIn PDF document text
    • http://xumetosakonir.iblogger.org/debewotiwejageren.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467300/normal_5fdb1c9198320.pdfIn PDF document text
    • https://xutekesavugev.weebly.com/uploads/1/3/5/3/135316407/167063.pdfIn PDF document text
    • https://radigaligoled.weebly.com/uploads/1/3/4/3/134333621/2fc8410.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494435/normal_600d41eb8b55f.pdfIn PDF document text
    • http://ziwixan.iblogger.org/vusoterajupuviju.pdfIn PDF document text
    • https://gafajabi.weebly.com/uploads/1/3/4/8/134880466/a23947.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480399/normal_5ffe27fd1021f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0da34dbf-c59c-4390-a08f-3d6c436ec96d/what_motorcycle_clubs_are_1_percenters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c73ebe3-d5bc-4090-9071-d6081b03f64f/bujaro.pdfIn PDF document text
    • https://56a7be67-7dca-40da-a973-69ad719fb73b.filesusr.com/ugd/fedf23_cb3ffae4daa841c2b290566b7dbb4934.pdf?index=trueIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_c4fec035fd1244d396b905b4d881f0bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea9f7e2-b3d8-4b68-893f-87b2efd042cb/xixejajesetujemekir.pdfIn PDF document text
    • http://wukobokako.rf.gd/tesis_sobre_el_bullying_escolar.pdfIn PDF document text
    • http://kofezinidabefu.epizy.com/accessible_information_standard_gp.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/charlie_and_the_chocolate_factory_musical_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/gizagapogilijogiwe.pdfIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_0aece28b9eef4d768a83acfe635443c9.pdf?index=trueIn PDF document text
    • https://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_6e41efd72cbf4a5eb9ef6af4c08a368e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8a21030-201d-4ced-b029-11bbdeb43504/introduction_to_mathematical_programming_winston_free_download.pdfIn PDF document text
    • http://fufabufitilaf.epizy.com/fracture_cuneiforme_medial_pied.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001042b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042B 5420 bytes
SHA-256: 05c2854972e503802044e36c341370bd5ece2319b23d34a255030e9a0d94fabc
font_01_sfnt_off000116a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A0 11472 bytes
SHA-256: 2aabc94279602c21843d048d2ec79ca42bcbdb5b389babcc4884338ebb1e2441