Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d136656ab573a9…

MALICIOUS

PDF

89.5 KB Created: 2021-03-30 13:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8d493a96cc2db992795b2bea58bf38c2 SHA-1: a2702c0d086e1b6a0f9774e885775a71de4a86d5 SHA-256: 16d136656ab573a91c6762375f54463d046831b200439f396f751d59ec0dc7b8
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'fokemale.ru', suggesting it's used to redirect users to a potentially malicious site. The document body, though heavily obfuscated, appears to contain metadata related to a product search, likely a lure to disguise the malicious redirection. No scripts were extracted, but the presence of multiple external links and the overall detection profile points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=whirlpool+ultimate+care+ii+gas+dryer+igniter PDF link annotation
    • https://cdn.sqhk.co/fukonovum/kheBfno/78338813431.pdfIn PDF document text
    • https://cdn.sqhk.co/sixerusesebu/qhc9Ahh/87260890830.pdfIn PDF document text
    • https://cdn.sqhk.co/zowesifona/bumJGhi/mivulupesowot.pdfIn PDF document text
    • http://podcard2020.site/penny_stocks_to_buy_now_canada_20217pf01.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/is_brandon_burlsworth_a_real_personcw319.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/ajzghia/booster_hashtags_for_tiktok_tok_get_followers_likes.pdfIn PDF document text
    • http://jidugisukeranav.iblogger.org/58766569042.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_b797e82745db4b7fb27ce80c87b94db5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff97db98-5c3a-498f-97f0-c1ac122985ac/dojixoloweput.pdfIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_121017a2fe1841e2ae845678a64a811e.pdf?index=trueIn PDF document text
    • https://5f1c1209-45f6-45c0-988a-e0aaa04be055.filesusr.com/ugd/ba5820_ce9fda36f4fa41a28ce6b3effa5aa348.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4621cf7-5d9e-4182-ad43-d273ad6be371/concordancia_diccionario_strong_hebreo_espaol.pdfIn PDF document text
    • https://311919ef-92bb-434b-a93e-382c1a5e2e65.filesusr.com/ugd/c893b4_8a6dbae705454572b5597ad981fe4aa2.pdf?index=trueIn PDF document text
    • http://dumojefupu.rf.gd/libelulololozusonolirab.pdfIn PDF document text
    • http://tegufomaliduki.epizy.com/pokemon_red_and_green_beta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86a6c001-7f2b-45d9-a4a0-be083ebce227/how_to_reset_epson_xp_620_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d6b64b5-0185-44c3-ba67-c884dc5fd92c/what_memory_card_does_ps_vita_use.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31C 5600 bytes
SHA-256: 93dd122a2990b01242af58c5e9f5c3f814e415f83c473665398819f27c18b404
font_01_sfnt_off00010600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10600 4684 bytes
SHA-256: e27abd2b73f4a712a23f71e20430fb9bfe6fd91aed05a9db71fcf964af91c3f1
font_02_sfnt_off000117b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B0 11992 bytes
SHA-256: 8b727f5307dfc63cae9dc63e455682ff8f53511a44c20a6ee9f0785ce9dbf8fc
font_03_sfnt_off000140b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B6 16244 bytes
SHA-256: 472311ced7f938f9d9e683e52a02ca5e26be3c3e5ca15d969d6388c0963ee173