Malicious PDF — malware analysis report

Static analysis result for SHA-256 501fca6e903c7016…

MALICIOUS

PDF

70.5 KB Created: 2021-02-07 15:48:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d2954013a4b8ac6a26072609f70bfbf3 SHA-1: 77dfb60b443fe9a2d72d77f2b13182b8dd7f09f5 SHA-256: 501fca6e903c70165d77bf7c20a99977c86fda2ca920a724e8c554b9abf80f16
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, including a known malicious redirector and a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, potentially for exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/square?utm_term=general+knowledge+quiz+easy+questions+and+answers In PDF document text
    • https://fojaxekixuwid.weebly.com/uploads/1/3/4/7/134743661/44abf.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/iagAig6/littlest_pet_shop_1035.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/ighggjf/fashion_tycoon_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375194/normal_5ff314562251c.pdfIn PDF document text
    • https://cdn.sqhk.co/sagitusat/hijhgiI/aldi_keto_shopping_list_printable.pdfIn PDF document text
    • https://xafusotegemuwif.weebly.com/uploads/1/3/5/3/135304795/2418670.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepilekot/FWjblSw/33691991202.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368242/normal_60066deb4f31e.pdfIn PDF document text
    • https://bejetatibuket.weebly.com/uploads/1/3/5/9/135957672/disedowade_jogid.pdfIn PDF document text
    • https://penopamez.weebly.com/uploads/1/3/4/4/134496097/6283985.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/Liiyghv/emergency_contacts_eyes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/tixap.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/delaware_corporation_annual_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/19416955914.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/new_movies_2018_bollywood_khatrimaza.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/accademia_florence_guided_tours.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/nanizerokiboxe.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/povalakikukoseloviral.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_off0000d5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E0 5456 bytes
SHA-256: 36c7dfabcf3744bad8c71fbf6081649b7fed7d8e4e598a0c6387eb77973e0ca0
font_01_sfnt_off0000e89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89D 10744 bytes
SHA-256: baf4b7c389c38d45b1bb228c384307f1c349abb15b6a853777238ab7ea0585bf

Open this report in the interactive analyzer, or submit your own file for analysis.