Malicious PDF — malware analysis report

Static analysis result for SHA-256 f632eabb45650717…

MALICIOUS

PDF

85.9 KB Created: 2021-03-28 22:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b6f4b7b70446c5a28b2b397f520e32c SHA-1: d69a62bdc74cf83fc719f001a2ac143ce1a20049 SHA-256: f632eabb456507176b75f38f0514cde61195b8a83c34569a493fd48f3709d472
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a phishing lure related to HIV/AIDS treatment. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing further malware or conducting phishing. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/award?keyword=treatment+of+hiv+aids+pdf
    • http://boomerangoo.site/how_to_replace_battery_2006_chevy_equinoxs54sc.pdf
    • https://cdn-cms.f-static.net/uploads/4489035/normal_60519559df2ad.pdf
    • http://nakezubelakibe.22web.org/marshmallow_recipe_gelatin_sheets.pdf
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/991925870809a.pdf
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/9425171.pdf
    • http://lavkavkusa.store/podejawikoxafukabapekafzeqov.pdf
    • https://jexolelogirif.weebly.com/uploads/1/3/4/9/134901145/adada644e636f.pdf
    • http://carishr.com/python_pandas_groupby_cheat_sheetcku35.pdf
    • http://pankreatitum.ru/pathfinder_kingmaker_magic_weapon_spellrhy1y.pdf
    • https://bamewubi.weebly.com/uploads/1/3/2/3/132303354/9277724.pdf
    • https://cdn-cms.f-static.net/uploads/4479212/normal_60359e0f24e50.pdf
    • http://tugajerugo.22web.org/87812513979.pdf
    • https://static.s123-cdn-static.com/uploads/4449622/normal_5fedc6f4719d3.pdf
    • https://jikudirag.weebly.com/uploads/1/3/4/0/134040407/6aca2474ab1.pdf
    • https://cdn-cms.f-static.net/uploads/4454161/normal_603f4c3b7f4f3.pdf
    • http://aicberg.net/355387389372qdls.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_52bb252206924cf0960f96c164ca1e72.pdf?index=true
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_6fe0a2d1c1f744c18fb407a4338c2a3d.pdf?index=true
    • https://s3.amazonaws.com/mukutud/calculus_volume_1_tom_m._apostol.pdf
    • https://0bef8565-087b-457a-960c-b0529baba50c.filesusr.com/ugd/638000_315fcaeb960a4939899265e09c534ca8.pdf?index=true
    • https://s3.amazonaws.com/salade/nexus_hsrp_configuration_guide.pdf
    • http://zelobiliteriwe.rf.gd/flowers_for_algernon_vocabulary_quiz_answers.pdf
    • https://s3.amazonaws.com/jufowokedunod/7531428174.pdf
    • http://janalusexisowa.epizy.com/84561796019.pdf
    • https://s3.amazonaws.com/loranoduzuja/anticoagulation_therapy_a_clinical_practice_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010565.bin
feae2eb14d24271cd5b04a736bc5c96c98b21e04e71b99f5d06473ed673de7de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10565 5044 bytes
font_01_sfnt_off00011660.bin
1855dbef51b35696302f92054f63ed37e0153528963f2d81469d747180c824b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11660 11060 bytes
font_02_sfnt_off00013bfc.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFC 4324 bytes

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