Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7a8ffd34ca63a3…

MALICIOUS

PDF

74.2 KB Created: 2021-03-23 04:28:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 27a3b37904e362cd2197b2b58db28762 SHA-1: 964b4f88cd37211a67810e0410911b66c61f63c8 SHA-256: fc7a8ffd34ca63a34da845edbb69e6cb336840be5470e3b4e77f6ff60545b853
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 0.9997

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://jumiwimov.ru/strik?utm_term=the+book+thief+book+pdf+download PDF link annotation
    • https://jixawapideraje.weebly.com/uploads/1/3/3/9/133997308/fef18b0a6fc4f3d.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/jikAjhb/troll_face_quest_video_memes_2_walkthrough.pdfIn PDF document text
    • https://zikixitifo.weebly.com/uploads/1/3/4/8/134897390/mupafudasixanu.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/dhcidst/arjun_reddy_trailer_bgm_music.pdfIn PDF document text
    • https://nakaporona.weebly.com/uploads/1/3/1/4/131438848/e137aad.pdfIn PDF document text
    • http://dafizejujen.22web.org/letanorelotevew.pdfIn PDF document text
    • https://nitafigiwulizo.weebly.com/uploads/1/3/1/4/131406945/buvilinokidawop.pdfIn PDF document text
    • https://liwuvena.weebly.com/uploads/1/3/1/3/131398027/paxexoduj.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/losapu.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/daraniwekamidir/fiesta_online_titles_guide.pdfIn PDF document text
    • http://mapodivopabo.rf.gd/antivirus_software_quick_heal_free.pdfIn PDF document text
    • http://wadarudi.epizy.com/bolaza.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/mixenawukasidogoj.pdfIn PDF document text
    • http://segukilu.epizy.com/lidatewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45f324a0-23f3-4f00-bd09-053be11bcc7f/xedakawufivagusamogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1bd7f7-afc3-474d-838e-e74aefcab6ab/27461041605.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/behind_sentence_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42a95cf-fc11-4164-af48-1f4ce954b740/best_reloading_press_for_300_blackout.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/89558682729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf98859c-a1d9-4516-be55-4fad0e77d2d6/microsoft_xbox_one_controller_wireless_adapter_windows_10.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_off0000e400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 5100 bytes
SHA-256: 46b401e635bb08aa774427dd478a40d4f9bb87ae62ced9a8f0ff05f0e70f4f08
font_01_sfnt_off0000f56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56B 10668 bytes
SHA-256: a76e46678a54aab3f90204f5c843a7ab16b01d86b850b5804b13c058d8b9416f

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