Malicious PDF — malware analysis report

Static analysis result for SHA-256 edebbe4c4b336710…

MALICIOUS

PDF

76.6 KB Created: 2021-04-24 16:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38b45ea37a8ea034d7ed0d1b92d53fcd SHA-1: 9bd13a6db4946dd8f5ca3e7719cabfd479e4c5ee SHA-256: edebbe4c4b336710db63048eda8725013b1fe956cbfa771a5eb8404e9a577bb4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in link farm or phishing attacks to direct users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of embedded URLs and the document's apparent attempt to disguise itself as price information for a popular product suggest a phishing or scam campaign. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

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://resalured.ru/strik?utm_term=irobot+roomba+vacuum+cleaner+price
    • https://cdn.sqhk.co/dofubetu/hggi0gf/ordinal_scale_example.pdf
    • https://cdn-cms.f-static.net/uploads/4456999/normal_6049c4157ebb1.pdf
    • https://cdn.sqhk.co/gipudeviwapi/gAibgeA/dupogugunabepegebax.pdf
    • https://cdn-cms.f-static.net/uploads/4409093/normal_605b023de3ee1.pdf
    • https://cdn.sqhk.co/xogudililavo/kNgiaZK/hypnia_matelas_memoire_de_forme.pdf
    • https://cdn.sqhk.co/lowimipofevu/dWgdcjd/jet_car_stunts_2_full_apk_free_download.pdf
    • https://static.s123-cdn-static.com/uploads/4391000/normal_6009ab2ac32b9.pdf
    • https://cdn-cms.f-static.net/uploads/4375340/normal_60460202cbebe.pdf
    • https://cdn.sqhk.co/setawefuwo/9hgwsie/14828547243.pdf
    • https://cdn-cms.f-static.net/uploads/4496811/normal_5fe75a4221c55.pdf
    • https://static.s123-cdn-static.com/uploads/4408002/normal_5ff365cd24acc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/148b4390-640b-4cb2-a8b2-bdfb25193108/2928582467.pdf
    • https://uploads.strikinglycdn.com/files/c2ab0d38-027b-44ee-944e-00dbcd1967e0/corsair_commander_pro_installation_diagram.pdf
    • https://s3.amazonaws.com/jozetej/asphalt_street_storm_racing_apk_free.pdf
    • https://2a403a33-5f6e-4534-96f9-742aa7325afc.filesusr.com/ugd/d2da83_a244a8fe1b454543a451231a403fba6b.pdf?index=true
    • https://s3.amazonaws.com/xetasif/nefifube.pdf
    • https://s3.amazonaws.com/ganubifirigevi/how_to_turn_on_my_adt_alarm_system.pdf
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_4faeb203503b4b14911a9f206a852afb.pdf?index=true
    • https://s3.amazonaws.com/midaguvimabof/fender_frontman_25r_schematic.pdf
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_31049d4dff1a4933a1b630b8a87f3d95.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_off0000eb48.bin
06f9c948f216b61a3e2d343934c3f71db0540db9bb4e91b3ed51a08f9bd5010a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB48 5040 bytes
font_01_sfnt_off0000fc57.bin
017e71e263202a3d7787aa2c3bd110c7c9937bc883461274430719c17cd8fbd4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC57 11788 bytes