Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaca047ce511609a…

MALICIOUS

PDF

73.8 KB Created: 2021-03-06 03:25:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d518b06b01505bac6ebebd78095b1541 SHA-1: d30cb5bd399256d5b612ff6dde8e357a8469a778 SHA-256: eaca047ce511609a36fa7b51776136ef7bbf7c6a5430b831b23e6c40fad60cfb
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to SEO-optimized domains, a common tactic for distributing malware or phishing content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature. The primary malicious URL identified is https://lozipotod.ru/123?utm_term=animal+farm+characters+vs+real+life.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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.
  • 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://lozipotod.ru/123?utm_term=animal+farm+characters+vs+real+life PDF link annotation
    • http://madoxorijegobe.sportsontheweb.net/51463035147.pdfIn PDF document text
    • https://fimudelowuj.weebly.com/uploads/1/3/1/4/131455024/efb6c6c744f.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/dolagukimidujevoga.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/black_and_decker_toaster_oven_manual_to1700sg.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/60868611143.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/el_caballero_de_la_armadura_oxidada_personajes.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/how_to_change_day_in_casio_g_shock.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/putuxuvetuj.pdfIn PDF document text
    • https://kuxaxamolexude.weebly.com/uploads/1/3/4/8/134869233/1203433.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/dikobepibelun/47037605049.pdfIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_5da7cefcd3af4c4f820fd3c68e855abf.pdf?index=trueIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_a609986c2610416788e19a0f7d8420d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/game_soul_blade_apk_data_mod.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_f334522400cf4cb9a94767ecb5a79707.pdf?index=trueIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_6d563320d3d947b1bc01e888967fa202.pdf?index=trueIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_f7c5139e03b24541a246d1a73914f147.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/tekuwewisutofonimamere.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/bhagalpur_station_2_number_platform.pdfIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_25a9bb7664e8417eb5235b3663480a6b.pdf?index=trueIn PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_91b7ab9fdf39413194d692eb011ea399.pdf?index=trueIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_31e214602bdc4791b745b7c216f57bf1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/python_3_regex_cheat_sheet.pdfIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_5de1ed7ccbce4bc2b05a0e5e607eae31.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_off0000e6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AF 5168 bytes
SHA-256: 0dbc149ca879b7e9a1c872653854cbb51992bed01a0f9401e9fcf22f58c0548b
font_01_sfnt_off0000f81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81F 9872 bytes
SHA-256: 7ccd1bd2588a016fb1f42746213c180d8048013e5be1d5b8fa1b2eb213a38c82