Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7c0d25d2ef2793…

MALICIOUS

PDF

81.3 KB Created: 2021-03-07 21:16:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1a29dfdbc259579b52dd5775fb2864a4 SHA-1: c9d89597392f147a3a397a70150a2bc8be73c2d0 SHA-256: 5e7c0d25d2ef27930c58c099a6a1e259f96267cd80152f481ade2d7862967a66
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable domains and employing UTM parameters, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. Although no scripts were extracted, the document's structure and embedded URLs point towards an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://gimoguvi.ru/strik?utm_term=best+detox+menu+plan PDF link annotation
    • http://tajuliwelofiti.medianewsonline.com/how_to_use_financial_calculator_to_calculate_pv.pdfIn PDF document text
    • https://tatedugede.weebly.com/uploads/1/3/4/3/134311852/benugejofunivu.pdfIn PDF document text
    • https://cdn.sqhk.co/lovuzegonu/eygiimP/78355973198.pdfIn PDF document text
    • https://cdn.sqhk.co/tafolaku/bigifgj/w3schools_python_while_loop.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/rcja5Ic/55161854989.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/tFfjegh/tiles_hop_game_music.pdfIn PDF document text
    • http://gitikirazidapi.medianewsonline.com/laptop_acer_aspire_v5_touch_screen.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/java_swing_button_color.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/xhiGLib/dopokebofosajixopux.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/farukoregibiv.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/hp_probook_6570b_drivers_camera.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/iSijjgd/tractor_pulling_games_for_ps4.pdfIn PDF document text
    • https://rofowijajexer.weebly.com/uploads/1/3/4/4/134476616/c4e8bb5a4591.pdfIn PDF document text
    • https://rurasaza.weebly.com/uploads/1/3/4/8/134869927/2057522.pdfIn PDF document text
    • https://cdn.sqhk.co/pubusudes/dhgsXji/baseball_vs_zombies_return_mod_apk.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/c594ea8a-ebd9-4a73-ad7b-1fdf3a1a2d5f/213213900.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/32217496616.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/20519476467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8ae4b2-99c3-42bf-abae-bdf583709fa4/xipajimiregavakuvibow.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/nimowafedoxurow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c794fa40-3596-4e0f-a2f8-3563bbed1f34/how_do_i_fix_the_oe_code_on_my_kenmore_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/meshare_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c60ec5bb-23b8-45dc-a9ce-365c4ff41258/salems_lot_remake_2019_cast.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_off00010254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10254 5124 bytes
SHA-256: b7731a693198afa72698b7bb323ad0156672aee3e10ccee0bf62245feb02cf83
font_01_sfnt_off000113b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B3 10568 bytes
SHA-256: 075c58eb69830adbe9eadb7da1ed4e4ab95f86043baabab2c272c1dc965f28a6