Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e29fac163845b2c…

MALICIOUS

PDF

80.2 KB Created: 2021-05-01 19:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 49cfaa1950a5ae5d0d28809d3af4dc01 SHA-1: 10e7114021cba6aff3eb4a2b13cd5d477cf82ca2 SHA-256: 4e29fac163845b2ceafd37a7eb3c2e16693a59b75daa6e84e3f05be399b00cfc
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=taco+bell+mexican+pizza+nutrition+information PDF link annotation
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdfIn PDF document text
    • http://telupizevos.iblogger.org/sociologija_religije_ivan_cvitkovic.pdfIn PDF document text
    • http://wurigebajufopo.22web.org/sejanineboniperipatibiza.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/idgc46C/indpay_app_user_locked.pdfIn PDF document text
    • https://cdn.sqhk.co/bozawenibiwa/gcihyff/lafoziwopedi.pdfIn PDF document text
    • https://cdn.sqhk.co/pilozarager/c9gjiiK/fukas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb15bab-b98f-47ea-b6b3-c7e299c14a80/53375769860.pdfIn PDF document text
    • http://deketinak.rf.gd/86541365996.pdfIn PDF document text
    • https://0b7b936c-93ac-4a60-9644-6ba220b934cc.filesusr.com/ugd/b4bf80_ae5968cf189d4b598c7e8f9efcef0103.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95defe8-6761-4c89-ab2b-27a4e45a47ff/mtd_snowblower_parts_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f52686a-f7e7-49ad-b8bc-e02db0c26ebb/nlp_python_best_books.pdfIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_02954fdecdda4cad8df546693bf4cd2e.pdf?index=trueIn PDF document text
    • http://sewesomepajava.epizy.com/nopiduxuwekekumopute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b952c077-eed7-4812-b37d-c80ab5863434/logo_design_software_open_source.pdfIn PDF document text
    • http://tamazodatitemi.epizy.com/bestwap_punjabi_song_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60decf59-fed2-434f-b83c-8f9e906931f3/fostex_mr-8hd_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6094d749-9725-4f69-a0b2-730b6529dec8/islamic_finder_prayer_times_san_diego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a63a6ec-4856-45cb-8967-0f7120ded314/samsung_rf267abrs_ice_maker_clicking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d233545b-e338-4bf5-b09a-d49dc4536bdd/installing_sunsetter_awning_on_vinyl_siding.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_off0000fbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF3 5192 bytes
SHA-256: 5f4770fac7174a433b58bc27a782b2071e3aa90fb19f825e33c247d0f4b6c00b
font_01_sfnt_off00010d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 11120 bytes
SHA-256: a425a4e1598029278013a3e713d70a77b6a6251261dd8ee46960a387551a52d4

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