Malicious PDF — malware analysis report

Static analysis result for SHA-256 0124006a9200cd26…

MALICIOUS

PDF

73.3 KB Created: 2020-11-13 13:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6e1945b6ba675ab6e1a8b9a77ca8e96 SHA-1: 5380abef6b151a00fae83b782443a85ab0b1d06e SHA-256: 0124006a9200cd264e8809a91f37b0a7761bcbfcc4289d2820bffd5f8a4f46f5
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link to known malicious infrastructure and a large number of SEO-linked PDFs. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to 'aerospace engineer salary'. The embedded URLs suggest a phishing or scam attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=salario+de+ingeniero+aeroespacial+lo
    • https://gilawigegazimo.weebly.com/uploads/1/3/4/5/134520665/pigotikexu.pdf
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/dcd826685938.pdf
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/1289421.pdf
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/xaletujogog.pdf
    • https://lamuvoraraxuz.weebly.com/uploads/1/3/4/4/134486612/gosofibev.pdf
    • https://nabidojanafo.weebly.com/uploads/1/3/4/4/134455463/wazavetadakomod.pdf
    • https://jobugatiponez.weebly.com/uploads/1/3/4/2/134234820/1611045.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/befevifa/salixuzejekigeleludeg.pdf
    • https://s3.amazonaws.com/nagev/gevinomogu.pdf
    • https://s3.amazonaws.com/zarusegibitumet/lozes.pdf
    • https://uploads.strikinglycdn.com/files/c8803195-7b5b-4d91-b55e-1591089456bd/dodoxojo.pdf
    • https://s3.amazonaws.com/sevoga/29569942218.pdf
    • https://uploads.strikinglycdn.com/files/b34a853c-f57f-4724-a5df-7463ee37c6c5/jiwavuzolifa.pdf
    • https://s3.amazonaws.com/betefowubevat/free_psychic_reading_online_free_chat.pdf
    • https://s3.amazonaws.com/vaxebisapesi/8_gauge_shotgun_for_sale.pdf
    • https://s3.amazonaws.com/nimuwet/16882742316.pdf
    • https://s3.amazonaws.com/daniwodug/cold_war_essay_intro.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d085.bin
36c9282b98f5c34684992c49fc5a340412ba688a4725ff5a5238ca51f6b26bdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD085 5052 bytes
font_01_sfnt_off0000e1a7.bin
af73d4c415850704769c4dac2672649e1ac00ea91fa3f0a9dde16651b6ab41b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A7 12120 bytes
font_02_sfnt_off00010884.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10884 4324 bytes

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