Malicious PDF — malware analysis report

Static analysis result for SHA-256 25276b976542fc2a…

MALICIOUS

PDF

72.4 KB Created: 2021-03-19 06:04:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4dd35cdd9867f8b1108cff0bc2252dcd SHA-1: 5a229241dcc880999fcb88aa6b5f708c250a62c4 SHA-256: 25276b976542fc2af85d7189b8351a67de687af3365a2b7e3f145ab5be1db457
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to redirect users to potentially harmful content or for SEO manipulation. While no scripts were explicitly extracted, the presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a malicious intent to distribute links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/wix?keyword=black+max+3550+generator+parts PDF link annotation
    • http://ita-yog.space/nubed2tw9t.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/hPjhNgh/smart_care_pulse_oximeter_price.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/zFgjIgd/gravity_falls_season_3_date.pdfIn PDF document text
    • https://cdn.sqhk.co/vekasurox/V52HQjc/drop_it_low_kat_deluna_remix.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/giglhJd/99335683902.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/5b29008.pdfIn PDF document text
    • https://bezofaxifi.weebly.com/uploads/1/3/1/6/131606652/899999.pdfIn PDF document text
    • http://complect-tech.ru/51764205832jkpa1.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/4hhBfjo/65725925063.pdfIn PDF document text
    • http://btsworld.org/vedonareraxuny16a.pdfIn PDF document text
    • https://cdn.sqhk.co/dozirolizilu/icwjbji/vidiq_promo_code.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/xhhggpc/castaways_bar_bay_city_michigan.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/jaOUojg/somozeruguxit.pdfIn PDF document text
    • https://mekowoto.weebly.com/uploads/1/3/0/7/130738632/77e85c2728.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/41hbric/facebook_search_people_s_posts_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/zhcJSne/fruit_chopper_apk.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/kodipopujufipig/afghan_jalebi_video_song_free_pagalworld._com.pdfIn PDF document text
    • http://zarufutebere.epizy.com/40743166272.pdfIn PDF document text
    • http://gexomawaretuz.rf.gd/sat_math_calculator_section_tips.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/55121125639.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/tetuwu.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_off0000d9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AB 5864 bytes
SHA-256: b1610c9bf82e66bd03cc65b01ce006fd9d323498518fec8ddea2d6580723a6b9
font_01_sfnt_off0000ed95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED95 10856 bytes
SHA-256: dd2f3149617a4015a3dbc5b4cee75a43198b6b065eb2cb90f907aa5a2b4ecbc2

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