Malicious PDF — malware analysis report

Static analysis result for SHA-256 0585ac1184d46770…

MALICIOUS

PDF

71.1 KB Created: 2021-03-12 08:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8ec062c56317289e8f00bda3d139fb0f SHA-1: 359d031177faf19f45164d0cfc1c6f4d9a448c04 SHA-256: 0585ac1184d46770642ef1b95d9238bb908c20b225c8dba6ab4dad18b8d50019
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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://crophysi.ru/strik?utm_term=over+the+rainbow+piano+chords+in+c PDF link annotation
    • http://vetapako.22web.org/9829670643.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/JjUjiP1/borikefamemibon.pdfIn PDF document text
    • http://christmas-gift.ru/tipping_point_radio_show_on_youtubeir9tq.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/O2jjrWC/38289607663.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/QjjT0LE/modern_warfare_2_release_date.pdfIn PDF document text
    • http://jogubewuzamofet.iblogger.org/the_5_elements_of_effective_thinking_by_edward_b._burger.pdfIn PDF document text
    • http://introdom.ru/98222385636k0kjw.pdfIn PDF document text
    • http://dress-russia.ru/23600888802mlq6k.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/jaAotRN/88625596780.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee04207c-f7a9-4857-9eab-9c1a3dc04ded/what_is_the_meaning_interest_rate_risk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ecb492-1806-4d9e-93c0-b633e0022848/64544202369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df4edf82-6fcf-4688-a42f-a0af6c316a1d/lejene.pdfIn PDF document text
    • http://tejademadubo.rf.gd/puwejisazekinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca7108f-bb40-48b9-91e5-4f29ed132d46/ocarina_of_time_3d_master_quest_spirit_temple.pdfIn PDF document text
    • http://magomigubilo.rf.gd/maytag_bravos_xl_washer_doesnt_spin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f267e4-2ae0-4787-8050-73a4877e640f/lg_ac_smart_error_codes.pdfIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_392f2365ee634f4ebc9d5484df174c7f.pdf?index=trueIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_3fa54748b6f748b5b58945f9bfdc5243.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57E 5448 bytes
SHA-256: 4d8d9718fb65a798d16ece9a2005556165293a35c744661579c47681d519f2f2
font_01_sfnt_off0000e807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE807 11224 bytes
SHA-256: fe7549dd2a53971d0cf1aba2fe76243a73a6035e63b9b5c5422be5a13c109dea

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