Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d14cb04eac81e6…

MALICIOUS

PDF

68.2 KB Created: 2021-04-26 11:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b97e6d0ce3bfdabafb87bfed327bf08 SHA-1: 76f1c853b7422795533031c0113a0f2f786b4599 SHA-256: e1d14cb04eac81e6fccffd2306fbc3dc9cc74e04c61c6534322a233e9c8dd229
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the structure suggest an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=genie+garage+door+opener+wired+keypad+not+working
    • http://totalcreditreport.info/fecha_de_carnavales_20208rqp0.pdf
    • https://cdn.sqhk.co/zuboxizip/fiehdgd/beveterunu.pdf
    • https://cdn.sqhk.co/jubawiwa/hBrhsEn/depimapimolisefukijov.pdf
    • https://bilurowunolip.weebly.com/uploads/1/3/4/3/134316979/05b86bee00d295.pdf
    • https://jamekefexufi.weebly.com/uploads/1/3/4/8/134866820/sibowolen.pdf
    • https://cdn.sqhk.co/xakutofi/Bje1jjm/bewizuzig.pdf
    • http://tryse.xyz/tinisoregevotufogem011y1.pdf
    • http://opt05.ru/marionettes_inc_summary0ymu6.pdf
    • http://cashbackmoney.info/pagidawapenozebadje.pdf
    • http://gratoramm.website/95847084597ltc4f.pdf
    • http://cancandance.org/kanuwavezifol8acz7.pdf
    • https://xidelora.weebly.com/uploads/1/3/5/2/135296398/6266289.pdf
    • https://cdn.sqhk.co/zatufora/Vhajehh/42416172351.pdf
    • https://zajinepimasi.weebly.com/uploads/1/3/2/8/132815118/ritimis_kexep_lukolonulesorot_nejatasa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zalisujezajaje/66798155033.pdf
    • https://s3.amazonaws.com/fifomi/outlook_application_for_android.pdf
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_69b20ada55fd4960b74249ae7c25a9dd.pdf?index=true
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_513261e43d8c46998499ea61a6677a87.pdf?index=true
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_519edb2474794c7fba9e5746c17d1ac2.pdf?index=true
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_8bd7b74b84dd42a1a0fb5280e8903dd3.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_off0000cfcc.bin
c4425b52ed5c11a4fc610a7d878bd4d860e82d61f7d019c9ca5d9399e2a7c853		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCC 5208 bytes
font_01_sfnt_off0000e1b3.bin
3c3b592f38aee8a9415f50d29a0ef0baa36a46f481554bf11fa17bcea7f69525		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B3 9780 bytes

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