Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcec993013259cf3…

MALICIOUS

PDF

83.4 KB Created: 2021-02-11 17:29:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ac8e401f421bb7771eec9e128072618f SHA-1: f193db766c63514caa4aa68cc5cc2374f7aacfac SHA-256: bcec993013259cf30e135c7b1dbff7a31802a0ea1e404fcb8cde30ef29900f9f
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to search queries, reinforcing the lure strategy.

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://crophysi.ru/wix?keyword=glencoe+geometry+chapter+9+answers PDF link annotation
    • http://thelandofbadideas.com/fulilunenelotetatufalibchdnr.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/zosixofogemoka.pdfIn PDF document text
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/1143158.pdfIn PDF document text
    • https://jodegometokak.weebly.com/uploads/1/3/1/6/131606115/6e8545db3f5dc.pdfIn PDF document text
    • https://fefizilev.weebly.com/uploads/1/3/1/4/131453506/jokowaxenik.pdfIn PDF document text
    • https://dobamadolexazi.weebly.com/uploads/1/3/4/4/134478964/jejejasi_jejuvosumag_jukonusirago.pdfIn PDF document text
    • https://gonalibage.weebly.com/uploads/1/3/4/6/134652093/9837419.pdfIn PDF document text
    • https://vigedinolig.weebly.com/uploads/1/3/1/3/131380992/1969361.pdfIn PDF document text
    • https://fosevagepuvuro.weebly.com/uploads/1/3/1/8/131858592/moboli.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/59hhzij/ufc_254_start_time.pdfIn PDF document text
    • https://juwomazitebuden.weebly.com/uploads/1/3/1/4/131414743/1423dad8f20.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/iIFjeJC/91642350003.pdfIn PDF document text
    • http://loxapul.iblogger.org/83711807743.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/fedojigudaj/softonic_android_data_recovery.pdfIn PDF document text
    • http://pesuvomekujidi.rf.gd/remove_header_in_excel_sheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 5728 bytes
SHA-256: ac3bc1624c4703ab7faba450d6d5c14d1b3e05cc8752ca7d3157fe7146002a08
font_01_sfnt_off0001036a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 11732 bytes
SHA-256: 4590528e6b95f2d0260d16abbc152ec81298d5887d2a7736401e3b59bcdc8f94
font_02_sfnt_off00012b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B37 16072 bytes
SHA-256: 24c5c481937acf4f4841e6563a6d7a18cfdb810806c94b09ac0ff4033348c1e6

Open this report in the interactive analyzer, or submit your own file for analysis.