Malicious PDF — malware analysis report

Static analysis result for SHA-256 9776210f2c0a91ff…

MALICIOUS

PDF

74.0 KB Created: 2021-02-18 15:19:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b42a7f731565928c10e485318c10aef8 SHA-1: 89f2353e91b964a413f2a5877f51050a873f84b8 SHA-256: 9776210f2c0a91ff5ccc4474dd86bd4f058075323a1552eb53a87a3b421cee21
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to other PDF files, suggesting a link farm or SEO spamming operation. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score strongly indicate malicious intent. The document body, though partially corrupted, contains text related to 'Fifty shades darker songs mp3 download free', indicating a lure for popular content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • 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://druttle.ru/123?utm_term=fifty+shades+darker+songs+mp3+download+free PDF link annotation
    • http://nelawetazabuta.66ghz.com/2015_gmc_acadia_intellilink_manual.pdfIn PDF document text
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/af003.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407313/normal_5ff5941f3045d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5fd8929eea9eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5ff2c38258116.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_601d24d68ce95.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/AGzLcjd/transferwise_money_transfer_rates.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_60165c0a4fc36.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/gcjajgx/morph_hide_and_seek_minecraft_pe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495265/normal_5ff9e277e03fd.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/tasufagijaremo/animal_crossing_pocket_camp_not_compatible_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/jawahar_navodaya_vidyalaya_omr_sheet_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/approach_song_by_parmish_verma.pdfIn PDF document text
    • http://jegudorutomowur.epizy.com/53704014420.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/69460345350.pdfIn PDF document text
    • http://wezekopufoj.rf.gd/gcse_chemistry_equation_sheet_edexcel.pdfIn PDF document text
    • http://desiwafinu.epizy.com/30082614915.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_off0000dbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD4 5832 bytes
SHA-256: b429f39614771dae396f12741c83f8e4a8a0d7f0f33184c7f729ed6441a05dad
font_01_sfnt_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 12452 bytes
SHA-256: 059639a5b329fc2ede05026fdf83001f23b6f670120635ddfd57e2a1961102d3

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