Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9aaf8c786ffd39…

MALICIOUS

PDF

74.7 KB Created: 2021-02-26 14:52:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4a2b0ce270a87313c6545e05186e1671 SHA-1: ec96b1008f06b109f8b7b881954a7cc5e72b938b SHA-256: 6d9aaf8c786ffd397fc9bc96fcc9133756b1dc9d265cf5f19265ec0027501923
186 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=nightmare+before+christmas+seat+covers PDF link annotation
    • https://karezolakep.weebly.com/uploads/1/3/1/3/131398125/01359d2a8f.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/5G3mjfz/man_down_song.pdfIn PDF document text
    • https://metatigizedi.weebly.com/uploads/1/3/1/3/131398099/firubojimajorejibej.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/ehcViaF/53723061425.pdfIn PDF document text
    • https://turabebusaweni.weebly.com/uploads/1/3/1/4/131438207/povubujexas_mopuxu_fuzufowobosofa.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/xixopuwo_dodubatemegego_tisinaxi_kekudikijebub.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/1Ijabia/ted_bundy_documentary_prime.pdfIn PDF document text
    • http://nuvoked.22web.org/free_classic_solitaire_for_windows_8._1.pdfIn PDF document text
    • https://waxagenejefud.weebly.com/uploads/1/3/4/7/134712445/pivelosomuma.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/lgzhan9/las_vegas_city_guide.pdfIn PDF document text
    • https://wufomuwu.weebly.com/uploads/1/3/0/9/130969972/rofikavipubawomuw.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/e0Zvjb6/45637243705.pdfIn PDF document text
    • https://wenudujajavu.weebly.com/uploads/1/3/5/3/135318124/9855119.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/K1jjhfZ/activity_launcher_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/gitZHSn/cascade_umc_youtube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zogezizoxupojep.epizy.com/top_round_roast_beef_cooking_time_per_pound_in_crock_pot.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/broken_arrow_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/18185593648.pdfIn PDF document text
    • http://faguvepeme.rf.gd/catlogo_mary_kay_2018.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_off0000da9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9F 5112 bytes
SHA-256: b5c06259897f2cf7d05a40b3a87f48731e5e8c09257912b3d7b97e9b1d3979ce
font_01_sfnt_off0000ec12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 10368 bytes
SHA-256: 78c5a71578f4bb9ee9396cedadf10618192c82d1881e13e06c4200a28a72cd46
font_02_sfnt_off00010f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F19 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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