Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad53b0577f59e92…

MALICIOUS

PDF

83.4 KB Created: 2021-01-13 17:55:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d362f93508a708217e6f8739bbe7bdbe SHA-1: 143edb8421eae77afc48a0c7eb1906fcff09cc12 SHA-256: 3ad53b0577f59e92fb627766ba99d03138edcac60e14bab9db56422ac7f40a03
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, pointing to suspicious domains like traffking.ru. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. Although no scripts were extracted, the embedded links and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffking.ru/aws?utm_term=performance+appraisal+essay+slideshare In PDF document text
    • https://static.s123-cdn-static.com/uploads/4365636/normal_5fce16c727936.pdfIn PDF document text
    • https://site-1226144.mozfiles.com/files/1226144/seabeard_animal_crossing.pdfIn PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/xodenog-wezapojewaju.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/HiMjagc/the_hunt_wild_duck_hunting_season_georgia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_5fd1128b3c528.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/sefiwegegagu/envision_florida_math_grade_6_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/33177303329.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/zodot.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/pelvic_massage_technique.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/1740882797.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/jugobob.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/juwezitorizemi.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10735 5496 bytes
SHA-256: 0868dc469e55075e481ea5644b10924e4532117bb44d627d45b19f565210b575
font_01_sfnt_off000119bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BD 11456 bytes
SHA-256: b0c945061b0341c08a15de96be809cda3810dfcb6d82929d8cb01a41951f14f2

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