Malicious PDF — malware analysis report

Static analysis result for SHA-256 2729d4a98a6ecf05…

MALICIOUS

PDF

83.9 KB Created: 2021-03-07 00:21:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 037c6c209508d4ff43aad90cd7c25bd6 SHA-1: a33bfe7ac6539439d5c045ae4c72607b36f4b0b3 SHA-256: 2729d4a98a6ecf05287fcd51d45e8dd3d8bb86da83892a3df9ba20dc2c3db9bb
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. The document contains numerous embedded URLs, with a notable concentration on a single domain, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of external links and the overall detection suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://bologen.ru/wb?keyword=2006%20dodge%20ram%203500%20diesel%20mpg PDF link annotation
    • http://rankingcoach-seo.com/dibudexikenobulirumowoboh5h76.pdfIn PDF document text
    • http://cocobeautybar.ca/51112299674ssnu1.pdfIn PDF document text
    • https://cdn.sqhk.co/kepozote/WyiiI3X/92072816806.pdfIn PDF document text
    • http://static-start.top/96714988289ygzau.pdfIn PDF document text
    • http://alex-chekalev.com/23764932622s4lhq.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/how_to_extract_cystic_acne_at_home.pdfIn PDF document text
    • http://ropisunofo.mygamesonline.org/41263053341.pdfIn PDF document text
    • http://goodshopsales.xyz/63023969286hex46.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/hU2jijd/crazy_frog_axel_f_hop_world_record.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tizexazebubo.atwebpages.com/the_way_of_the_world_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c65dcd-ae60-4f53-b2b9-7b56dcb1d759/samsung_vrt_plus_washer_codes_4c.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/81911167239.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/42007913566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5218dbe7-3acb-4736-ac40-f15ccbdb1897/is_walking_dead_comics_finished.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b382be-d775-430d-952a-26a916cde646/zexofazudituvozilopol.pdfIn PDF document text
    • http://nununad.myartsonline.com/what_do_you_mean_by_short_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/680c4331-133f-4c05-8dad-6efd2152bbd2/well_always_have_summer_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/free_corporate_event_checklist_template.pdfIn PDF document text
    • http://nibizuladode.onlinewebshop.net/attack_on_titan_movie_part_2_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46de17d-2ccd-4a52-918d-d3f68b64f6a2/lawn_boy_10684_c_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66188abd-acea-4ae4-a87d-3371e582b722/how_to_put_vicks_in_a_humidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348cd9b6-e5c5-4086-9359-e7bf4f277cd5/barrons_essential_words_for_the_toefl.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/69652042752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b1c0a1-9c9b-45ae-b34f-e30da78d92be/xosufino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7ebc75b-61de-48be-b87f-34dc6b2c9eee/what_type_of_charger_does_a_kindle_take.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/apa_article_abstract_format.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_off000107ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CE 5900 bytes
SHA-256: e9aa778a23cb8a95bb755decb66fba2373dfbcbb32ba237bd2a4b9988188a112
font_01_sfnt_off00011bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCC 11488 bytes
SHA-256: e9293e75085b7557805b3f69bdae70ae6cde69220dc71d7bb1f2a66d30ab2571