Malicious PDF — malware analysis report

Static analysis result for SHA-256 79a4407993a5b168…

MALICIOUS

PDF

84.7 KB Created: 2021-03-07 17:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3aebc5d160d9516a4eaa0e276a7f0c6e SHA-1: 966fce6dae0aa3720323ef7a67fdb321a78145b0 SHA-256: 79a4407993a5b1689244135dc9427a5a5f9e0c44dfcab70cb88aee4d4487a0e0
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'stock market game login'. The presence of multiple PDF links and a critical heuristic firing for malicious redirector links indicates a strong intent to direct users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=stock+market+game+login In PDF document text
    • http://gesetaxoxu.sportsontheweb.net/how_to_reset_samsung_galaxy_s6_back_to_factory_settings.pdfIn PDF document text
    • https://mifadugusukar.weebly.com/uploads/1/3/5/3/135337027/4183682.pdfIn PDF document text
    • http://twirlini.com/what_not_to_eat_when_you_have_dental_abscess5qtu7.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/godowupatumekim.pdfIn PDF document text
    • https://cdn.sqhk.co/xinefegepe/Thwifhg/watch_nfl_network_online_free_live_streaming_uk.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/kiwuletizifezamawuribmuf0.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/56538519310.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/89206947261f8t2c.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/koledilemunumezuxog.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/comment_flouter_une_partie_dunvbmvp.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/best_way_to_pump_with_spectra_s1.pdfIn PDF document text
    • http://bigswinner.space/pearl_of_great_price_catholic_biblevbexg.pdfIn PDF document text
    • https://tijaworiluwulu.weebly.com/uploads/1/3/4/3/134363233/vepipumulapesu.pdfIn PDF document text
    • https://depagolal.weebly.com/uploads/1/3/0/8/130813973/pipotuna-pasobupukizufi-vizobi-gomosurolakam.pdfIn PDF document text
    • https://cdn.sqhk.co/selodiro/cbieGhh/pocket_rocket_electric_bike_price.pdfIn PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/xefakafokarasoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/tupovoxoradumamemimozife.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/batata_vada_recipe_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/99192109745.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/arbitrary_waveform_generator_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/37357030775.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/the_bye_bye_man_book.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_off00010010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10010 4896 bytes
SHA-256: 52af43a3a88dfcc166d9c0e064de2eaba2f4982d889a1e0d7a005fbb1f6f7cd4
font_01_sfnt_off00011087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11087 11424 bytes
SHA-256: 483d68887b92672f3ef78d69398f9dec08ff9c0c4901953b726017aad0651cfe
font_02_sfnt_off00013763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13763 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71