Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89453044049eac5…

MALICIOUS

PDF

91.4 KB Created: 2021-03-28 08:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 02d90c78b75b4ee1adbf8678f0f87931 SHA-1: b292ce88be8a4c63bdcf123732b7cf8f08a15d3a SHA-256: f89453044049eac56ecbb1b1b0db9ff7fb8b87c41ac7de143d7a490db99a549f
184 Risk Score

Malware Insights

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

The PDF contains embedded links to external URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure for downloading a PDF related to criminal psychology, aligning with phishing or scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/award?keyword=criminal+psychology+pdf+free+download In PDF document text
    • http://thesalle.xyz/for_honor_kensei_beginner_guidepn4od.pdfIn PDF document text
    • http://lovukexux.iblogger.org/fadafimifipu.pdfIn PDF document text
    • http://magazok.top/temperature_chart_for_food_safetypb54s.pdfIn PDF document text
    • https://rolorizumi.weebly.com/uploads/1/3/4/3/134316308/1b07bebf47bb9bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443354/normal_60316d0b4bf41.pdfIn PDF document text
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/xijafikume_vawib_nekavako.pdfIn PDF document text
    • https://lujoduxatodovaw.weebly.com/uploads/1/3/2/3/132302833/4f92073a089f96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421058/normal_60048e0f8ec35.pdfIn PDF document text
    • http://bettermoneytips.com/43274042204l9f6j.pdfIn PDF document text
    • http://sedouche.xyz/sonic_nutrition_facts_breakfastcg2jd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5fc71fb6dc702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5fd8ec2b8178a.pdfIn PDF document text
    • https://riwurarelix.weebly.com/uploads/1/3/4/4/134484082/2816d546d2e.pdfIn PDF document text
    • http://antonioit.fun/47423463800xrekq.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/varolexexus/emea_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/7_personality_types.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_6470e2732798422697b66210d1d3e42b.pdf?index=trueIn PDF document text
    • http://papixunaz.epizy.com/excellent_words_to_use_in_an_essay.pdfIn PDF document text
    • http://notizawudix.epizy.com/absorcion_y_secrecion_intestinal.pdfIn PDF document text
    • https://1e35b969-1f99-48dc-8aa8-d0fb9638bdc8.filesusr.com/ugd/970baa_02cbb3dbf9f446258ae25fe6f0df4ea2.pdf?index=trueIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_a2c45e95e2ca44f2be60b43e9a9a7c4e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/somamere/fasedujoserejepefumijovo.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_off000124fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FA 5668 bytes
SHA-256: 25c099a3e2c398a0d001354e07f948f3b313eddd2dbce5213044ddafb349a27d
font_01_sfnt_off00013825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13825 11980 bytes
SHA-256: d7669d7b48a85c231335a50eb3a094f0ba67ee538ec6e744f5000ca214a439a5