Malicious PDF — malware analysis report

Static analysis result for SHA-256 05357f3260a2e042…

MALICIOUS

PDF

79.9 KB Created: 2021-03-31 23:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 802c8d7065bd2287d9bc1955a2ddacb9 SHA-1: 75ddf3abbd6e0a397a88558ae2bda41f7d00b575 SHA-256: 05357f3260a2e042a3f23e54e0cd0167b24b26bc768d9f592d0aa7daf5313fac
164 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are generated for SEO purposes, indicating a link farm. One of the extracted URLs, 'https://bologen.ru/wix?keyword=showbox+apk+mirror+4.27', is flagged as suspicious. The ClamAV detection and ML classifier further support the malicious nature of this PDF, likely intended to trick users into downloading unwanted or harmful software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=showbox+apk+mirror+4.27
    • https://cdn.sqhk.co/nenafodud/JhdhsHS/spin_the_bottle_questions_adults.pdf
    • http://bikelumonekodex.mygamesonline.org/magneto_abrasive_jet_machining.pdf
    • https://cdn.sqhk.co/rekosiseweno/JC9jcQh/62468358553.pdf
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/4462db540434919.pdf
    • https://cdn.sqhk.co/noneniwetav/rjgonia/dugiwejugikijawivirovuz.pdf
    • https://cdn.sqhk.co/fitamorigob/h6fkNge/hot_wheels_track_builder_unlimited_long_jump_pack.pdf
    • https://cdn.sqhk.co/kitaparek/TCk8QsU/vector_2_game_free_download_for_pc.pdf
    • https://cdn.sqhk.co/dodanadofu/S3jewYI/48117448910.pdf
    • https://sewurinibe.weebly.com/uploads/1/3/4/5/134595705/dda41d62a.pdf
    • https://sonikegusu.weebly.com/uploads/1/3/3/9/133997348/sazeje_pojivo.pdf
    • http://erogan24.website/what_is_sat_in_pakistanvowpp.pdf
    • http://mebets.xyz/lifamulobijodixuduwevewixdzc7t.pdf
    • https://cdn.sqhk.co/sifalavuxozo/g3Zxhf2/women_s_mountain_bike_shoes_flats.pdf
    • http://kosamaritaj.getenjoyment.net/48100690649.pdf
    • http://lagejarejitog.mypressonline.com/what_are_the_basic_rules_of_differentiation.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://telusomabufa.onlinewebshop.net/can_you_nap_with_daily_contacts_in.pdf
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_a80fb160d0ee4080996869fa41463ec5.pdf?index=true
    • https://19004eff-8f5e-45b0-b15a-9fbdbd99e39d.filesusr.com/ugd/578ea4_72d498be750d450e9bb948cd3c1f7e5a.pdf?index=true
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_297069868d1c4bd9b1b8e8af2ccc33ab.pdf?index=true
    • https://74df6fe0-557b-4e47-8461-f2df536053d0.filesusr.com/ugd/4dcf4e_e5cf2117dfd6423caac949d1ac739dfa.pdf?index=true
    • https://3b1a0cff-dc54-4917-88c1-cdf904a8db56.filesusr.com/ugd/60aab8_d0f47736882048388d1866d001b8468b.pdf?index=true
    • http://wififeju.atwebpages.com/heart_of_darkness_short_story.pdf
    • 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_off0000ebd1.bin
0869f08b28a8232b496d62cf217b20d60f093a82e4db0967442cacb74799150b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD1 5132 bytes
font_01_sfnt_off0000fd50.bin
af1aec9c50a36df7662bd94e09547a237a5e53d9011fe0e304a1c8ed56d47961		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD50 11024 bytes
font_02_sfnt_off000122c7.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122C7 4324 bytes

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