Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f44b9fe00b2a0d…

MALICIOUS

PDF

78.3 KB Created: 2021-04-17 09:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a39dfab60e69ba570c445d84dfe8c7b5 SHA-1: 3086bb2d78c1c39468e09b87b5be6c87f087837d SHA-256: c2f44b9fe00b2a0d1e66d1612799f490d6582cba40cf8ecd2c17d0880ff311cd
186 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 potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of external links and the overall structure point towards a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://xezojetit.ru/strik?utm_term=social+media+marketing+society+reviews
    • https://cdn.sqhk.co/busoleva/he8UhiA/lubiturekezulegibi.pdf
    • https://valazasabo.weebly.com/uploads/1/3/1/3/131398294/5969975.pdf
    • https://zisumujabi.weebly.com/uploads/1/3/5/3/135315444/3b32503ad49a9.pdf
    • https://cdn.sqhk.co/tenokesime/i8gclli/evil_cogs_game.pdf
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/dijejodujisezixolix.pdf
    • http://faromobipon.22web.org/poxebejagadebebuxadupis.pdf
    • https://buritozube.weebly.com/uploads/1/3/0/7/130775753/gutidup_sogaxabaje_jugugazixexi.pdf
    • https://cdn.sqhk.co/xoxamomajil/hhJwruc/kodiak_island_bears.pdf
    • https://cdn.sqhk.co/detokelixipi/CmoCpgj/sagajadupirejaregenuwe.pdf
    • http://xisajole.iblogger.org/google_play_store_pending_help.pdf
    • https://cdn.sqhk.co/fizuborugas/aiaYxgt/robin_hood_2018_imdb_parents_guide.pdf
    • https://guwevene.weebly.com/uploads/1/3/1/4/131437413/dogovevovudap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_5ec3725b122d411bbaed3691748082de.pdf?index=true
    • https://d85b1738-a471-4043-b59e-116b2bb794a3.filesusr.com/ugd/97927e_1a4486880c7045c5966ed3e0291c6d7b.pdf?index=true
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_afa04ded0bb8460680b754a8c820daf3.pdf?index=true
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_a9bcbd5a901d4f32ae034b04fc169dda.pdf?index=true
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_6aaf11279b9e457cbbe99b542bd00f74.pdf?index=true
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_034cfde6218d4c1d92aca8bd56e7df21.pdf?index=true
    • https://uploads.strikinglycdn.com/files/90a12460-5729-45cf-9fd7-582a46d2e7d4/how_to_program_pentair_intelliflo_variable_speed_pool_pump.pdf
    • http://ribugozetuxofo.rf.gd/xovajiwizafix.pdf
    • https://uploads.strikinglycdn.com/files/42a5eb50-bf58-4e4b-8cab-e46501842381/the_woman_in_the_window_where_to_watch_canada.pdf
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_d38036784f344d789a11edc0cf1ffaa0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1b33510e-07ab-4f50-9dee-5ba305d0798a/ironhead_sportster_service_manual.pdf
    • http://lakuxizutigevo.rf.gd/free_weekly_workout_log_template.pdf
    • https://uploads.strikinglycdn.com/files/f1bf90fd-a8dd-4a9c-aa6f-66c1c37fc0f5/eager_beaver_chainsaw_fuel_mixture.pdf
    • https://uploads.strikinglycdn.com/files/3063fc41-d058-4bea-892f-074076772929/comparative_and_superlative_adjectives_advanced_exercises.pdf
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_da23a0ae581d4e359038d79c7ffb011d.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e443.bin
aabf12547b28173d38d409b33ea3135b6b75ca89997d79d20988c9805fdddf6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 5468 bytes
font_01_sfnt_off0000f6c7.bin
b1e4dba9734296e16c2e793bf201fbb8e2509bf8d6b3029c71e41ddaebdac72f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C7 10640 bytes
font_02_sfnt_off00011b3e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3E 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.