Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce001cde1395d9a…

MALICIOUS

PDF

72.5 KB Created: 2021-03-28 23:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 915ba80b8ab3c15419312e1274a34556 SHA-1: 678b31f10cb263997a7dfbb87f229529df4ed7e6 SHA-256: fce001cde1395d9a883400e685c5214580c8512fe32b0a322f78765cea92d540
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or link farm distribution mechanism. It contains numerous external links, many hosted on disposable domains, designed to redirect users to other sites. The presence of external URIs and the overall structure strongly suggest an attempt to direct users to malicious or deceptive content, likely for phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=niv+audio+bible+dramatized+proverbs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386621/normal_601ad1da4d586.pdfIn PDF document text
    • https://wofinomedek.weebly.com/uploads/1/3/4/1/134108675/zakuvezevolesewud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369505/normal_5fe0f2961d31a.pdfIn PDF document text
    • https://niliwuwez.weebly.com/uploads/1/3/4/2/134265541/7673107.pdfIn PDF document text
    • http://teagreen.space/tidewagemowaru9lnox.pdfIn PDF document text
    • http://storeplus.pro/78499350353rfeye.pdfIn PDF document text
    • http://ttttrrrr.space/candy_run_5k_20200angg.pdfIn PDF document text
    • https://rulusekiraz.weebly.com/uploads/1/3/5/3/135322703/4321775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502175/normal_6054db1f678c6.pdfIn PDF document text
    • https://juzemadarerux.weebly.com/uploads/1/3/1/4/131437885/dukiwux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444644/normal_6052288355b47.pdfIn PDF document text
    • http://firstreadersclub.com/how_to_replace_black_ink_cartridge_hp_envy_4500uneva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453105/normal_604a487b6f1d1.pdfIn PDF document text
    • http://peuer.xyz/the_hateful_eight_extended_version_parents_guideuurg6.pdfIn PDF document text
    • https://damajarulapo.weebly.com/uploads/1/3/0/7/130738748/1299c37fd0de20.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
    • https://s3.amazonaws.com/garorowa/the_fountainhead_movie_imdb.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/34383386523.pdfIn PDF document text
    • https://d692b82a-d563-45ba-818c-0512d98079dc.filesusr.com/ugd/1c7397_6d8035fcc5ed4d83b5db7ff16a769b4e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/vusisamokogasivelapil.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/watch_sex_and_the_city_season_3_streaming.pdfIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_d4e10aca5d344069bc24f6a3c57afbb6.pdf?index=trueIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_9b2db6bfa9fe4cf6ab407773c3cac473.pdf?index=trueIn 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_off0000d1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A1 5100 bytes
SHA-256: 3c57015008c1b57e6a714844b1ec37f263273cd253add86d8241a564c47fd385
font_01_sfnt_off0000e301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE301 10452 bytes
SHA-256: 43cad00c5d06b1659c664e7b4cf95aa7f3d64da13ee0ae046be6fe8f34b70dc3
font_02_sfnt_off00010616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c