Malicious PDF — malware analysis report

Static analysis result for SHA-256 c257265998ce2cfd…

MALICIOUS

PDF

78.1 KB Created: 2021-03-12 20:23:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f1252e537acfe0031f1e7fcec000bd24 SHA-1: 2c28c323f16c9edfa363a9cbdb45a7b96665eb3c SHA-256: c257265998ce2cfd9aa7e2d42ffa7f0cf50b26b157f2fba90c0f91f800934e06
204 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, employing a 'download button' heuristic and a large number of external links, many of which point to SEO-optimized PDF files. The primary URL, 'https://fokemale.ru/wix?keyword=market+unlocker+3.3.3+apk', suggests an attempt to trick users into downloading software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://fokemale.ru/wix?keyword=market+unlocker+3.3.3+apk PDF link annotation
    • https://dibevoxatatot.weebly.com/uploads/1/3/1/1/131164568/pelonigix_difafugipirimuk_kusikijat.pdfIn PDF document text
    • https://tofixotiz.weebly.com/uploads/1/3/4/6/134621190/dekonagotoda.pdfIn PDF document text
    • https://lozavogifod.weebly.com/uploads/1/3/4/4/134482976/c21ef90700.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/YhdBjhl/49104368910.pdfIn PDF document text
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/bipolufozoluj-xurubujilej-ziwufaxefaxilo.pdfIn PDF document text
    • https://cdn.sqhk.co/najafizox/gTbtRef/lyrica_75_mg_generic_name.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sojaxub/game_insaniquarium_deluxe_mod.pdfIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_bbabfac495f044a99192d50617e6cadb.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_f1229a49a5e64b3b8ea04f9c2d357fe7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/how_to_fetch_data_from_database_in_android_and_display_in_recyclerview.pdfIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_5f9ec356841944f387b5d9d36715a4f7.pdf?index=trueIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_c2598351f24243caa8410c7dbea7aa87.pdf?index=trueIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_74940e14d9f748bfabe04361ea20b104.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/tisazuf.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/formation_of_hydrogen_cyanide_equation.pdfIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_b233b0ed66db49fe895396fedf5a85bf.pdf?index=trueIn PDF document text
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_a5206c725b9349349687715738d7df82.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/8172787261.pdfIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_849e90066bf4464da3f9ccb8a21ff335.pdf?index=trueIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_09e27ae315004314942427a217b8cb18.pdf?index=trueIn 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_off0000f622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF622 5016 bytes
SHA-256: f50b0a80ef981e249e0ec4dbc648a5136b61b9cb102544abedddbc4753b6e474
font_01_sfnt_off00010756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10756 10792 bytes
SHA-256: 8d13448ed7315a75cbaa5c0a68a0e011a79bf51103cd5f04a8657a94ef68f243

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