Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0aaad542163caed…

MALICIOUS

PDF

74.9 KB Created: 2021-02-23 22:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6d11aaee15f45f3b22110a18aeaa404b SHA-1: ba99104d4765730d45eefd8ae0748d57e16a8107 SHA-256: e0aaad542163caeda15a81a423f7f639cbc3e4260b65e940875d552d806fa8f4
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URLs, many pointing to disposable hosting services, characteristic of a link farm designed to redirect users. The presence of embedded URLs and the 'link farm' heuristic strongly suggest the document's purpose is to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=hill+rom+centrella+price PDF link annotation
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/zijuvonopelisowatu.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/hhj7jb7/gosijubovukalanolilugur.pdfIn PDF document text
    • https://xubidanata.weebly.com/uploads/1/3/4/8/134895671/dixefikitolijiguf.pdfIn PDF document text
    • https://cdn.sqhk.co/diduwuposenu/eAhdhcp/zara_jeans_men.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_6022bf854b9b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_60175d069f893.pdfIn PDF document text
    • https://cdn.sqhk.co/boguzivipel/Omhe4gj/lullaby_rockabye_baby_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/bheA68B/rewafasofogij.pdfIn PDF document text
    • https://cdn.sqhk.co/fokatekox/iABiajh/fast_legacy_racing_mod_apk_download.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/253702.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493589/normal_5fecf7ca5cf02.pdfIn PDF document text
    • https://cdn.sqhk.co/wazofelagi/haQoWig/magic_rampage_2._6_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/eWio1gj/smashing_the_battle_mod_apk_android_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bujisovi.epizy.com/d_d_5e_bard_spells_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/jovefofem.pdfIn PDF document text
    • http://litofafowiralo.epizy.com/jerej.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE747 4864 bytes
SHA-256: a0d287b930d757edf87caf6add021607cdf8c28850d5e471ea8f381ddd7b2005
font_01_sfnt_off0000f7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B4 11200 bytes
SHA-256: 6b2fe14da2728660595e6340eb57fd28a402e008a110aa74da4369531811c8ad

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