Malicious PDF — malware analysis report

Static analysis result for SHA-256 1261360dd1929fb8…

MALICIOUS

PDF

75.6 KB Created: 2021-04-30 00:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d22dab3b98615aec630da15a73d8346e SHA-1: 1dc8351b34f17362711a0e980becd4242a1cf956 SHA-256: 1261360dd1929fb8706ae7f80e912d40583a5f834456c1b12e3f3dfb3b494b34
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website discussing a common technical issue, likely as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. While no scripts were directly extracted, the presence of external URIs and the overall detection suggest the document is designed to lead the user to a malicious site, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://kuzutuzo.ru/strik?utm_term=why+does+my+mower+belt+keep+coming+off
    • http://vuvuga.xyz/9226528704ne3fg.pdf
    • http://amsidgi.xyz/crazy_rich_asians_streaming_vostfr62qo3.pdf
    • http://magnifioco.site/skyrim_load_order_helperfd7og.pdf
    • http://upsbox.ru/xotinujiromagamevunatexat5y3mj.pdf
    • http://swast-group.website/najafomurn4tsd.pdf
    • http://bluebadgeapproval.com/panasonic_omnimovie_vhs_battery_chargerp6hqq.pdf
    • http://znakomstva18x.site/39007923399sm5p8.pdf
    • http://flipping-car.online/jijepalewotonotiw7779a.pdf
    • http://bluebadge-support.com/74417901175ipi1q.pdf
    • http://gamedv.design/xaruluberupozufct0cl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b072eb40-e129-4fd2-b2e6-30389c5ee214/bose_acoustimass_10_subwoofer_not_working.pdf
    • http://vopimivukaf.epizy.com/bilaka.pdf
    • https://uploads.strikinglycdn.com/files/cf53c8a0-07a3-4306-976e-cb0cbdc2b462/which_mixer_attachment_for_pastry.pdf
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_12baa86221cf4ece89bb78a6de30602c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4aa16922-84de-41d8-8ed6-06e6f87b1700/23154222979.pdf
    • https://uploads.strikinglycdn.com/files/b8037419-fb3c-4c87-bc96-ba00375c96fa/lg_inverter_direct_drive_washer_top_load_instructions.pdf
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_4baa15333e6d4ea6bff6f1fc3bf12448.pdf?index=true
    • http://nepopujadulipid.epizy.com/16515172721.pdf
    • https://uploads.strikinglycdn.com/files/acab8e97-9c6d-4dc6-9234-a381fbaae6db/38103363492.pdf
    • https://uploads.strikinglycdn.com/files/79beb18b-ecb8-4e5a-ad4e-b2f616fc2ce6/sinagewizopiw.pdf
    • https://uploads.strikinglycdn.com/files/707aa44c-99a2-4528-98cf-5cd2f888a2f9/social_psychology_7th_canadian_edition_myers.pdf
    • http://wigexoli.rf.gd/65761850116.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_off0000e93a.bin
786b16e988ef966e106587dcc10da7280a33b2dc66b760be42c34287a0118037		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE93A 5772 bytes
font_01_sfnt_off0000fcd9.bin
4154e1b6c677ef54eca5d8e9d4bb250dafefb69b1806227ea14b99de4b3c17cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD9 10492 bytes

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