Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e95bd833603082f…

MALICIOUS

PDF

72.9 KB Created: 2021-03-11 02:22:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 022d92c64a36b55f5de29cb2db29d4de SHA-1: 93128060acda9c2e8f565c39f8a93436d7e7b630 SHA-256: 1e95bd833603082f9444617cdddbf03c71aa6db8613734ca80c6c195dc273499
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to disposable domains and identified as part of a link farm, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly supports this, indicating the PDF's purpose is to host many links on potentially untrusted or disposable hosting. No scripts were extracted, but the presence of numerous external URIs is a primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/wix?keyword=defi+nitive+anime+on+crack+defibrillator PDF link annotation
    • http://selavaxanunuv.iblogger.org/70270588957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445116/normal_603f5b948e274.pdfIn PDF document text
    • http://jidapuxedepu.medianewsonline.com/2987733479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450355/normal_60395553aed81.pdfIn PDF document text
    • http://domainlimax.xyz/knock_balls_hack_apk4d1i4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488137/normal_60029b8911ce0.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/can_trx_reach_1.pdfIn PDF document text
    • http://rebezun.mygamesonline.org/31515129063.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467577/normal_5fdeea240fe90.pdfIn PDF document text
    • http://koolmaxt.online/30344835498resl3.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/44489882055.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://petafifagaj.rf.gd/lelumikidori.pdfIn PDF document text
    • http://tikimiwuwal.myartsonline.com/nursing_physical_examination_and_health_assessment.pdfIn PDF document text
    • http://kegipufi.rf.gd/67527176366.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/abrahaminte_santhathikal_song_maango.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/bezuxevajunagid.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/16745514811.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/formal_letter_planning_sheet_ks2.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/71025552548.pdfIn PDF document text
    • http://nezepalonajiden.epizy.com/lanavarojepawogipumolofar.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/jefexifebanulatiku.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD136 5040 bytes
SHA-256: 9c50266f1b27a0e31f2383e059f491679cbe3587ca0cd7bd796d609db9ec90e5
font_01_sfnt_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 11948 bytes
SHA-256: 4ff8b9724fa984a23e6d48c5e5dd1fc475ea3bb44ae17569aad84109bd0ae491
font_02_sfnt_off0001081c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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