Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d53d9f50d058f08…

MALICIOUS

PDF

81.0 KB Created: 2021-02-24 21:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 78cd704269d8ba3f9d9ac57c49fbda08 SHA-1: b99c95ade443fde78e27355ad89958fe582c4db3 SHA-256: 9d53d9f50d058f08a2b4bc6f1a884b5b2c8b5d841b4f8242e36f274bb9ac94cb
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with one specifically pointing to 'jottigo.ru' related to furnace wiring, likely a lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to distribute malicious links across disposable hosting, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://jottigo.ru/wb?keyword=how%20to%20wire%20a%20furnace%20limit%20switch PDF link annotation
    • https://nidikibadut.weebly.com/uploads/1/3/1/4/131453007/1583259.pdfIn PDF document text
    • https://vusimipemukebev.weebly.com/uploads/1/3/0/8/130814393/6517999.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/ghgihjb/joker_poker_pinball_machine_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/hbMidhd/29706727742.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450140/normal_5ff0947144ebd.pdfIn PDF document text
    • https://rowegodidevonu.weebly.com/uploads/1/3/4/4/134468430/pizijusolu.pdfIn PDF document text
    • https://raralafelu.weebly.com/uploads/1/3/4/4/134476833/mepogulorejuvi-pufezakotuw.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/oldways_mediterranean_diet_brochure.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/k0Wihwe/sandwich_spot_menu_palm_springs.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/zojemazagexokelojevekow.pdfIn PDF document text
    • https://divekoworubu.weebly.com/uploads/1/3/4/0/134017674/labufuzilut.pdfIn PDF document text
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/siwopizojiz.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/LgfFhH6/animation_throwdown_the_collectible_card_game_mod_apk.pdfIn PDF document text
    • https://bexudedumazises.weebly.com/uploads/1/3/1/4/131406785/soturur_neriliwabe_nofekurug_pafol.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/vuzutupejodav.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/samopakamefap/lelofogelosobanaduzuxag.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/apple_music_android_airplay.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/zilegetuzudunedulijanu.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/98528774019.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001003b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 5172 bytes
SHA-256: d2f5159a40af21371a99b62296dfd1e02e3828b0c806c114ff597f83e07edf3d
font_01_sfnt_off000111b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B7 10972 bytes
SHA-256: c4167111bd3ccd1594a3d4684f92410122ed4148cbd829802c1ca34f0c0a2c7a

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