Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d73e4b3aa32cbf3…

MALICIOUS

PDF

87.8 KB Created: 2021-03-26 13:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c6eebb5fd34a7c8c55a771297981924c SHA-1: 8307b432437a91e96d89d4a8ac8d42a119c1a245 SHA-256: 9d73e4b3aa32cbf3b78859bd16f278e306b50373a1ba3fe93e2070c299451708
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting it functions as a link farm. One prominent URL, 'https://resalured.ru/wix?keyword=mta+bus+depot', appears to be the primary lure, likely directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • 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 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://resalured.ru/wix?keyword=mta+bus+depot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368501/normal_600a16d7af7e8.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/gfGDhab/76600133578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446273/normal_604499574ed28.pdfIn PDF document text
    • https://bokitixeloto.weebly.com/uploads/1/3/5/3/135344606/lizemuwuvafisofig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_604d29656c927.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/kaxovakakedofilobu.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/bcf8432c64bae.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/icqjghc/68829946022.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/87593284076.pdfIn PDF document text
    • http://megolapafa.iblogger.org/76815876184.pdfIn PDF document text
    • https://gewipilozu.weebly.com/uploads/1/3/0/7/130775211/2e90c94fb3613.pdfIn PDF document text
    • https://mitukuruzatag.weebly.com/uploads/1/3/5/3/135346955/xevavojewegif-jigamajanak-riwegasevovike-towam.pdfIn PDF document text
    • https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/bb8c5a29f.pdfIn PDF document text
    • http://jinoxiresajigeb.iblogger.org/baarish_song_neha_kakkar_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384459/normal_5fcd6fc9c8156.pdfIn PDF document text
    • http://paxulujomem.iblogger.org/75576728937.pdfIn PDF document text
    • http://gixotakopopunod.22web.org/video_quartile_reporting.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/ELWnjc5/pejorizumezopi.pdfIn PDF document text
    • http://vonaguk.iblogger.org/android_10_update_list_phones.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/ccna_cyber_ops.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/flVgeig/pixaxonomizixarasolefal.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/lwWKxid/42418431480.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zozafiromilofin.epizy.com/arboriculture_fruitire_gressent.pdfIn PDF document text
    • http://xavujoz.rf.gd/alter_ego_2_manuel.pdfIn PDF document text
    • http://ragejifi.epizy.com/complete_the_square_problems.pdfIn PDF document text
    • http://pezatiwasab.epizy.com/73543136064.pdfIn PDF document text
    • http://kubimuze.rf.gd/aristotle_the_rhetoric.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11877 4968 bytes
SHA-256: 24d9fae61361e0ba0a77f0629ffe4bd15832b7ce632b887331f9b7ecc07a6f6f
font_01_sfnt_off00012974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12974 12032 bytes
SHA-256: 2c255b68065b67488322a416c7d7c9eea83fbe790320b4ebc2cfbc06646a2521

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