Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9512825dc0d808a…

MALICIOUS

PDF

81.5 KB Created: 2021-02-17 12:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f5efa197f757ac2a24d6d1edaf076164 SHA-1: 4e605d2b406a74202d567d1533d753cd512d95d1 SHA-256: b9512825dc0d808a8182a8ef1609dec6dcb7245cf4f91cb9ad4ca5d994c3fe54
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the document is designed to host many links on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://baarspo.ru/wix?keyword=pegasusmon+vs+angemon PDF link annotation
    • https://cdn.sqhk.co/zidezofa/Libhbgj/piresugopororetevod.pdfIn PDF document text
    • https://cdn.sqhk.co/girasufu/yfgfVia/fagunuxu.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/90Oif02/settlers_of_catan_game_piece_dimensions.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/tggjjhW/verb_to_fly_simple_past_tense.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/augmented_reality_introduction4qs66.pdfIn PDF document text
    • https://cdn.sqhk.co/balapakufogo/DjjpieR/71636756989.pdfIn PDF document text
    • http://jigitozunawada.66ghz.com/aggiornamento_android_10_huawei_mate_20_lite.pdfIn PDF document text
    • http://masuxokovofa.66ghz.com/warilapasufon.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/idI0ife/life_is_strange_frank_conversation_guide.pdfIn PDF document text
    • http://pabixigenived.22web.org/l_c_r_ka_full_form.pdfIn PDF document text
    • http://goduvide.22web.org/countermeasure_report_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/ecEiho7/15809594126.pdfIn PDF document text
    • http://b4shop.icu/angelic_symbols_and_meaningss3vc9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujividexisero.rf.gd/bawivibivojomovopos.pdfIn PDF document text
    • http://lejopuluke.rf.gd/31831203763.pdfIn PDF document text
    • http://wobagufiri.rf.gd/insyde_bios_update.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB67 6592 bytes
SHA-256: 465f5acb3bca6a9e51aa15643912eb1a735085a824da6c002d2c16527ca5cc1b
font_01_sfnt_off00010213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10213 4936 bytes
SHA-256: 505c5337f016fa44e0f27b845debd8ba1fd595721b0e5764587d03d84bed5ba6
font_02_sfnt_off000112de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DE 11312 bytes
SHA-256: 4cee45a2f05276fea2d6e51bfd776b13a7b0df1223db68da54f0d8edde185a52

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