Malicious PDF — malware analysis report

Static analysis result for SHA-256 959348b41d4267ee…

MALICIOUS

PDF

70.5 KB Created: 2021-03-22 22:23:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 5e77235307a92ea6ce6106863804a8e1 SHA-1: 8655ac80d30088e9b5ced9887c6e841c421f50c4 SHA-256: 959348b41d4267ee347d87dda4e71a646ed0ddf32e533746dad1a55cea88aa73
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ClamAV signature and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs, such as 'https://jumiwimov.ru/wix?keyword=deck+of+destiny+caraval+buy', are likely used to direct users to malicious content. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jumiwimov.ru/wix?keyword=deck+of+destiny+caraval+buy PDF link annotation
    • http://wssummer.space/92523360187t666f.pdfIn PDF document text
    • http://idealicaitaly.site/845886972288tzhv.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/nxYgdge/gakebedupovirimujakemapu.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/kutapebimegire.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiziluda/NjejjAP/tarkov_weapon_mastery_animations.pdfIn PDF document text
    • https://cdn.sqhk.co/raxavetaletu/HxCm2hi/35466954759.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/IVZtieW/fojajirepijim.pdfIn PDF document text
    • http://forkidsshop.online/turobaviwesales8u2t.pdfIn PDF document text
    • http://usejus.pro/mefulxcxax.pdfIn PDF document text
    • https://cdn.sqhk.co/bezorufuv/jiaijUI/download_sound_effect_youtuber_free_fire.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/fibcEhb/nevubiwiso.pdfIn PDF document text
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/7959220.pdfIn PDF document text
    • https://cdn.sqhk.co/purorenutuw/jdrjbgi/63489962363.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/hgqkiio/4_clues_word_search_game_answers.pdfIn PDF document text
    • http://axecheat5.xyz/naxuzuramafo70oxu.pdfIn PDF document text
    • https://cdn.sqhk.co/sofetarunox/ihFiiid/demo_warlock_pve_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/xokipuxat/Diijili/44900511148.pdfIn PDF document text
    • https://nobewiga.weebly.com/uploads/1/3/5/3/135315034/e13788fedc92833.pdfIn PDF document text
    • http://milano-moda.space/tandy_1650_computerized_chessc0g7u.pdfIn PDF document text
    • https://veximukexapi.weebly.com/uploads/1/3/0/9/130969798/xinugozabajew.pdfIn PDF document text
    • https://vibusipapomokij.weebly.com/uploads/1/3/2/6/132682711/d483cf1.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/75ad5ed7-a0f0-4c81-9ddc-4fa21957c1a7/samsung_galaxy_s5_t_mobile_unlock_code_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/446c05e4-19d5-4973-a437-4b632aa983f2/sat_geometry_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b06fb9-b094-4d98-a1cc-35c2ed8f1b3d/the_face_on_the_milk_carton_movie_rating.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_off0000cb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB86 5380 bytes
SHA-256: 7453bc426624e829903fc874edc53f045d30167e21989de8f5d48fdb34da8adf
font_01_sfnt_off0000ddf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF3 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000e681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE681 11104 bytes
SHA-256: 97918f529513e62e1a4c059cd32e38efeb01cfaa108031a85de4d1a5c6177140