Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26f0a1478180aa2…

MALICIOUS

PDF

82.0 KB Created: 2021-03-28 16:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1402b41b0077de316142526d3be4b200 SHA-1: cfb9d1f3c830988239c458a7ed453a4670c4445e SHA-256: e26f0a1478180aa25382462404c706ef37fccc0b1244e6202faadc358cdcbbdd
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the use of embedded JavaScript for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://nipisod.ru/wix?keyword=pokemon+platinum+game+guide PDF link annotation
    • https://cdn.sqhk.co/romumoxoleno/2OhdE3s/sharp_aquos_remote_gb118wjsa_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/WQiiDEF/dutifiwokawopuxu.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/54320180340.pdfIn PDF document text
    • https://cdn.sqhk.co/mozulunilex/BSjqxjc/the_frostrune_hints.pdfIn PDF document text
    • https://birugenok.weebly.com/uploads/1/3/4/6/134632973/rosujak-kevefebigibigil-nebajifuwej-gogedudiwexi.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/jejanugukuliwene.pdfIn PDF document text
    • https://minunelojob.weebly.com/uploads/1/3/1/4/131453060/08c6bc11fc68be0.pdfIn PDF document text
    • https://pufodafu.weebly.com/uploads/1/3/5/9/135959320/xilifewinugesi_falamaxivaw_sularum.pdfIn PDF document text
    • https://nirulutot.weebly.com/uploads/1/3/4/7/134700174/a462e52b42a0.pdfIn PDF document text
    • http://wwbook.org/giant_panda_eats_shoots_and_leavesbawff.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/wavuwukuxevupesoxeri.pdfIn PDF document text
    • https://cdn.sqhk.co/zevolazezag/aidT6jd/mavabikokirin.pdfIn PDF document text
    • http://betmoy54.com/steel_floor_framing_costs05zz.pdfIn PDF document text
    • http://phulop.store/how_to_connect_wireless_printer_hp_deskjet_2541w6x6c.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/amiodarone_hcl_davis.pdfIn PDF document text
    • https://wemafijape.weebly.com/uploads/1/3/4/7/134775870/8552807.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/iieIOMz/iptv_android_tv_4pda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/53526f9f-8abd-43ec-923e-171fae79c4f1/dureduvuwer.pdfIn PDF document text
    • http://vuzinibijabu.rf.gd/audition_1._5_full_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3096aa3-7fd7-46fe-8fc4-258e443555f5/xowuwegepofuzegefumetup.pdfIn PDF document text
    • http://jutatodimat.epizy.com/42727436855.pdfIn PDF document text
    • http://tilawiveso.rf.gd/mixtures_and_alligations_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/889192a1-49e4-4f0e-8307-838980510077/34219224586.pdfIn PDF document text
    • http://gapusamini.rf.gd/logisemololawugidowud.pdfIn PDF document text
    • http://wagadepepixapu.epizy.com/35439854670.pdfIn PDF document text
    • http://maretubozewugi.myartsonline.com/23505431981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1feeacb3-12e0-4f27-9692-a545d3d88319/nasej.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_off0001016e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016E 5068 bytes
SHA-256: 7a9ae1d17f80c1f04640f72256f0be67734dcf3198adea41ebfa754f36965197
font_01_sfnt_off000112a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A4 11800 bytes
SHA-256: 754f1862d1b8a9db4805f7da75d7a7add7e5ea9937e1ffd8e47cd60caf621aa9