Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe22303029a22a52…

MALICIOUS

PDF

82.3 KB Created: 2021-04-17 06:36:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 74160cfe83cf0d3604ad31133352a6b8 SHA-1: b755ca8f5a3a9060b3bbbf701323a9077ae772e4 SHA-256: fe22303029a22a52a75ac21b503ba984db9a0859937fbb8afbde52a60af97ffd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://gimoguvi.ru/strik?utm_term=general+mistakes+in+spoken+english PDF link annotation
    • http://betizekaxu.getenjoyment.net/21370483181.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/HhdFm24/kunomalirinijavilarax.pdfIn PDF document text
    • http://xuritepizib.mygamesonline.org/kaleshwaram_project_images.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490724/normal_5ff577a4b70be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366367/normal_60064957ec3d1.pdfIn PDF document text
    • http://gemajelibetojup.scienceontheweb.net/2x72_belt_grinder_plans_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530151/normal_606e1cd232550.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/pevenuj.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/hgI6hj0/sims_freeplay_cheats_2019_no_human_verification.pdfIn PDF document text
    • http://sexedate69.site/863850805742shz3.pdfIn PDF document text
    • http://drive4mclaneaustell.com/tusezugesabusadnh1gy.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwiketi/id4jfDB/nonprofit_succession_planning_template.pdfIn PDF document text
    • https://cdn.sqhk.co/lijumifi/hjdJnqj/format_factory_for_windows_7_32_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/cbibjcX/viluwepegulunomuzew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411491/normal_60419f4da52f7.pdfIn PDF document text
    • http://xogumilagu.iblogger.org/adobe_after_effects_beginner_tutorials.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wofenexofube.rf.gd/list_of_adjectives_for_elementary_students.pdfIn PDF document text
    • http://zasotozipob.rf.gd/my_photos_keep_opening_in_paint.pdfIn PDF document text
    • http://lekowezitodog.rf.gd/arinc_direct_flight_plan_formats.pdfIn PDF document text
    • https://63d876aa-455f-4c41-9c38-50747f3e0b95.filesusr.com/ugd/a220d5_c01ba34242db499eae6b1aef6afbf4fb.pdf?index=trueIn PDF document text
    • https://cbf60184-924b-4e65-abc2-244eb733ec12.filesusr.com/ugd/9a25f9_11b806ecd28740519605920f172c25bb.pdf?index=trueIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_a616ad886d3f4d64ae423ec2ef990ad8.pdf?index=trueIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_7493a06cac344c09ba86017107419344.pdf?index=trueIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_ac0227217dc549ab98c8a45654f26104.pdf?index=trueIn 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_off00010556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10556 5328 bytes
SHA-256: 094698c2f02588de3ffa6c084143a630be7c59525ae2c367b4e46088ba3b379e
font_01_sfnt_off0001174a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174A 10560 bytes
SHA-256: d81e27622d5861ee81d0f9445fc91eb48b26ae6b956948d1f4e5bc7cf51944e5

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