Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ff851ae9f5e0ac…

MALICIOUS

PDF

74.0 KB Created: 2021-05-31 16:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fdcf26dd9218eaf783d619cdf4bf3f2 SHA-1: d22548e90d5e42b20ae24e6c6603190d47924735 SHA-256: b0ff851ae9f5e0acacb5703edcc0527c50f1b58ed7f6d397f00dade2d280ffcb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link leading to a domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, potentially leveraging embedded JavaScript for obfuscation or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://philabc.ru/pbw?utm_term=how+to+reset+your+kenmore+elite+dishwasher
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/7671571.pdf
    • https://lamuwopinu.weebly.com/uploads/1/3/4/6/134632291/falojotiberugo-wexil-sesabasetenagal-natenodijexojo.pdf
    • https://guxevelanitab.weebly.com/uploads/1/3/4/7/134769418/4274851.pdf
    • https://rudanivaxaf.weebly.com/uploads/1/3/4/4/134497940/c1891703b4a4.pdf
    • https://pikulevixabokof.weebly.com/uploads/1/3/1/6/131606248/xopituvozapi.pdf
    • https://gabavogafev.weebly.com/uploads/1/3/4/0/134000006/68018fb76b60845.pdf
    • https://fuwamelewupo.weebly.com/uploads/1/3/4/1/134131589/roxebe_talodejus_kezikevaxelab.pdf
    • https://gunarolapikomi.weebly.com/uploads/1/3/4/4/134442839/xokotoxevela-gogewob-fotit-kemus.pdf
    • https://pibofarijefi.weebly.com/uploads/1/3/4/6/134648305/fazaroliveno.pdf
    • https://zadevadetolilug.weebly.com/uploads/1/3/5/3/135321342/7257830.pdf
    • https://jumejavirufefe.weebly.com/uploads/1/3/4/7/134765112/veboso-tagoxikifinur-gutizab-zowawime.pdf
    • https://xakukanezo.weebly.com/uploads/1/3/4/8/134898234/legatigozawa.pdf
    • https://topudamix.weebly.com/uploads/1/3/4/5/134581811/6371cb05f.pdf
    • https://sexetolekik.weebly.com/uploads/1/3/4/6/134632248/3629124.pdf
    • https://jemidezegin.weebly.com/uploads/1/3/0/8/130874295/4680702.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a7b291f3-7174-4497-8396-d1785c13face/bagawavabifomuwavunup.pdf
    • https://uploads.strikinglycdn.com/files/589d5414-1381-494f-81a3-a84016a27f4b/what_is_ctrl_x_in_mac.pdf
    • https://uploads.strikinglycdn.com/files/4641c53a-a816-4f9f-8d2f-bf8f6e68f1ce/10983853720.pdf
    • https://uploads.strikinglycdn.com/files/abb6fe9e-b4e6-432e-bb86-1a9e8f6e2c61/how_do_i_change_my_arris_wifi_password.pdf
    • https://uploads.strikinglycdn.com/files/acb6de6c-0438-4a8a-966c-60186cf605a9/girl_scout_daisy_good_neighbor_badge_requirements.pdf
    • https://uploads.strikinglycdn.com/files/ae307928-b45f-4c07-8f09-5e0be5749794/how_to_solve_two_step_inequality_word_problems.pdf
    • https://uploads.strikinglycdn.com/files/52258662-73d9-4cec-91fb-cd74d3b395df/what_does_gnostic_christian_mean.pdf
    • https://uploads.strikinglycdn.com/files/5d894751-ee20-4bd1-870e-d5aa17dc9d92/87286444861.pdf
    • https://uploads.strikinglycdn.com/files/0bb51b60-a8ce-477a-ba42-98d57ac9405f/focusrite_scarlett_2i4_second_generation.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f7.bin
7d3650139c46d35e958460cd82ed759ca6dde94da7a3a56c859e995e4fcca8e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 5284 bytes
font_01_sfnt_off0000f6d1.bin
355f5433011fcb1b585a3dd31af10d75700a0ff4b8cfc7e6a068fc3c2ed16a98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D1 10384 bytes

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