Malicious PDF — malware analysis report

Static analysis result for SHA-256 6574692e880a3836…

MALICIOUS

PDF

83.9 KB Created: 2021-04-02 04:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e9930f77f664fc64f17b22b122963d27 SHA-1: c48364c5dbd389ad4a900f435c6facef219c59c4 SHA-256: 6574692e880a38363485f6c45e8f991ce6a3cbc547fc2ae441652f4132a9a964
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/award?keyword=crossfit+bodyweight+exercises+pdf PDF link annotation
    • http://mujododaziwato.scienceontheweb.net/wuwesomiliredutasoxe.pdfIn PDF document text
    • http://kilibuda.22web.org/13746881087.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/7518636.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/ia6RvZc/photo_video_maker_online_free.pdfIn PDF document text
    • http://kidufamipowanot.mywebcommunity.org/33210626399.pdfIn PDF document text
    • https://xamudoniganotew.weebly.com/uploads/1/3/4/5/134509964/mabatanejo.pdfIn PDF document text
    • https://babapijolirex.weebly.com/uploads/1/3/1/4/131409508/6136454.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/high84j/94507910797.pdfIn PDF document text
    • http://nalodorepuwag.getenjoyment.net/xugafun.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/jifewi.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/gh8jdfa/auto_dealer_tycoon_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/2stiih4/bubble_shooter_crack_pc_game_setup.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawitaxug/NMtEDjb/oreo_milkshake_recipe_without_blender.pdfIn PDF document text
    • http://noxesim.iblogger.org/98315129297.pdfIn PDF document text
    • http://ligufotenoradod.iblogger.org/61543464059.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://8d2868a3-57b7-484c-81f6-493c1c4f5daa.filesusr.com/ugd/a8ca0f_2fd08716adf44787854f8eb148c1fb49.pdf?index=trueIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_fe909ebec65e4330b42842128ad15fa6.pdf?index=trueIn PDF document text
    • http://xevijojikutep.onlinewebshop.net/93217590715.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/42250886886.pdfIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/bisapafibunigid.pdfIn PDF document text
    • http://raxusitusumulag.rf.gd/i_am_the_lorax_meme_template.pdfIn PDF document text
    • http://tiwedozesa.atwebpages.com/birth_asphyxia.pdfIn PDF document text
    • http://ritumogadoj.onlinewebshop.net/what_is_the_best_light_for_light_therapy.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB52 5480 bytes
SHA-256: 5848c0bed293338fb88cf0e28ce0b22dab8ef5257ec94e1c43e883f6964ab483
font_01_sfnt_off00010e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E05 6148 bytes
SHA-256: 0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207
font_02_sfnt_off00011de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE5 10456 bytes
SHA-256: 1671cd0e7579f4ecbdfe51ccc55168ea3e20f1c19c012b649dcbe05eff9af189