Malicious PDF — malware analysis report

Static analysis result for SHA-256 2275656e06e8b700…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 19:07:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecc476cc1eb54db75057d9be2da96242 SHA-1: 739316c1ef5a7a722477d8f1fa9b54d0b0bcb471 SHA-256: 2275656e06e8b70013d3bffcc863096e80ea3e82017353ded2c11dd3dfe8b8d1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious or phishing-related domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier also strongly suggest malicious intent. The embedded URL 'https://soxebez.ru/wix?keyword=veritext+court+reporting+jobs' appears to be a lure for job-related phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://soxebez.ru/wix?keyword=veritext+court+reporting+jobs
    • http://mekifaremijes.iblogger.org/ssc_biology_notes_in_english.pdf
    • https://nabidojanafo.weebly.com/uploads/1/3/4/4/134455463/16927.pdf
    • https://bosagibanili.weebly.com/uploads/1/3/2/6/132682134/b045a863.pdf
    • http://ejinaya.com/jekipejopedu9s79.pdf
    • http://auto-agents.space/dance_like_song_lyrics_mp3_downloadvsgqw.pdf
    • http://logazajosoba.iblogger.org/2301782998.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/96032941-90f5-4200-98d2-6738491da9a8/wamud.pdf
    • https://uploads.strikinglycdn.com/files/35131e8f-3960-479f-b48a-9fb1264ec7d1/75131193129.pdf
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_f76fc115a83a4a829594f7168ca20bee.pdf?index=true
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_4dd32cf445924cb8b5645535d661cd32.pdf?index=true
    • https://uploads.strikinglycdn.com/files/41bcdf0f-1610-4ff5-a75a-9ac975c73e3a/hp_8620_printhead_replacement_part.pdf
    • http://mitegoma.rf.gd/biophysics_for_dummies_free.pdf
    • https://uploads.strikinglycdn.com/files/5cef9d14-7819-4557-a8f7-fb6c0ca75c48/zasozukesavabenejife.pdf
    • https://uploads.strikinglycdn.com/files/d9cacd9e-a5ab-41cc-92ba-729e440f5bfd/57039325024.pdf
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_4f5840bdabbb40838a8e8e9c859b92f6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/29603338-00ef-4174-ad46-6bdb448f53a7/sharp_ac_remote_control_instructions.pdf
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_b27e8a2e7f2d46ecb370db2894ff85fd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7581afff-a689-47d1-8b9d-c0fbdf98bd84/jacuzzi_sand_filter_multiport_valve.pdf
    • https://uploads.strikinglycdn.com/files/e967c1a2-d67f-4865-8bad-7d395c43808a/what_are_the_characteristics_of_an_evil_person.pdf
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_9ecbfe1200f545e58bd8a99cb18a44bd.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eecd.bin
8a37cb45d1c12cadc5de528e026ce08df440c44c8c2af55010ca6035b3a3f142		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEECD 5108 bytes
font_01_sfnt_off0001004e.bin
4c648f0dd11838d58d5c839b745c76e571bb1ee8cd86d37c9d02ec1c03b4a3f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 11068 bytes

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