Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7876ed31daeffca…

MALICIOUS

PDF

77.3 KB Created: 2021-03-03 08:55:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 6a69ab50e9c45bb4cd12fdd02a1e34dd SHA-1: 80b749b57302feee1b19a80779b239d13570b697 SHA-256: e7876ed31daeffca5dcae6ea17894c37d8bc7373bcc74f6c1aae6ac0b7e09ae4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of numerous links to disposable domains and redirectors strongly suggests a phishing or malware distribution attempt. The ClamAV detection further supports the malicious classification.

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 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.
  • 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/123?utm_term=what+is+iatf+16949+wikipedia In PDF document text
    • http://metryck.info/apple_music_na_android_tvormck.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498330/normal_601cbab45d9c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368770/normal_5fc729ad26b58.pdfIn PDF document text
    • http://waneboto.66ghz.com/tabiwuzeg.pdfIn PDF document text
    • http://idealica-ufficiale.site/polyhedron_worksheetx1s2q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495975/normal_5ffc676fcd6fe.pdfIn PDF document text
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/7213140.pdfIn PDF document text
    • http://testertumentum.space/how_to_update_verizon_jetpackwlvuj.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/78c293884a.pdfIn PDF document text
    • http://profmaster74.ru/msi_970a_g46_bios_reset2hr1g.pdfIn PDF document text
    • https://marajudalade.weebly.com/uploads/1/3/1/4/131438096/b2caf4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiwimawa.rf.gd/angular_6_formbuilder_checkbox.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/73495533823.pdfIn PDF document text
    • http://setuvufijub.epizy.com/dapatijiboribanawe.pdfIn PDF document text
    • http://metusajixano.epizy.com/60850672596.pdfIn PDF document text
    • http://kawuduzan.rf.gd/how_many_carbs_in_sonic_diet_cherry_limeade.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_off0000f0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 5620 bytes
SHA-256: 6f9f063f0263e7d1f9d55a15bc2cbc8ffff65a1226159f3bf250b4449b70bd5a
font_01_sfnt_off00010429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10429 10460 bytes
SHA-256: 06ddbdaa115ad379a17d8a03032c716eea126b2135aa18dcbe02921bdb57fa42

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