Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8d249ecd3553b1…

MALICIOUS

PDF

80.6 KB Created: 2021-03-11 09:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 22de145c28b485ed0c6fd7f042cbbe0e SHA-1: c983dea1589096e3fe43be4f5a973de822055d40 SHA-256: ab8d249ecd3553b1cb5f14fcb6e9cc794fed08c21004729c99ae66c70c9ab048
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm and an embedded URI pointing to a game cheat-related URL. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely a downloader or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://jottigo.ru/wix?keyword=dragonvale+breeding+cheats+for+gemstone+dragons PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387586/normal_6014036ae9cd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475730/normal_60060fc553e2a.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/gfibIge/nika_futterman_voices.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422180/normal_60137909bf6ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450260/normal_5fc5f7ac4c874.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409243/normal_5fc90a845077e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460970/normal_6009da21a9f20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_603e439cb2c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467278/normal_6016648bbb7e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_60183b25d42bf.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/2vThjdU/folekurazilaluxuvebofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479210/normal_5fea2a29ad905.pdfIn PDF document text
    • https://gupufema.weebly.com/uploads/1/3/4/4/134456882/vosakowazuzilo-gimogu-rijuviviwezi-tuwevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_5fdb94447c7e7.pdfIn PDF document text
    • https://pavedivagew.weebly.com/uploads/1/3/4/4/134468388/5495890.pdfIn PDF document text
    • https://vutakajar.weebly.com/uploads/1/3/4/8/134896426/lerisatunu.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/hjfHUxM/8703197690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_6016c593240b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501046/normal_5ff2e28070390.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
    • https://s3.amazonaws.com/luramamelolem/zonidigaf.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/i_a_n_t_ka_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/arya_2004_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/l_alimentation_quilibre.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/does_national_guard_get_paid_more_than_reserves.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_off0000f0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 5424 bytes
SHA-256: c78d287a9bec6c34c23b84beac708e4756b273d99fd4731b6ba533ee92571036
font_01_sfnt_off000102e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E8 10384 bytes
SHA-256: 61ed1be803ef2c27aae98cc1d6b3bf1246fadee73f3590cb9438bf35a2c4cf06
font_02_sfnt_off00012639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12639 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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