Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b98982acf7ebb6…

MALICIOUS

PDF

73.3 KB Created: 2021-06-04 01:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3ca7f62cdfa5cf0d6c4fd034b72277cb SHA-1: a765a75a1d8194c1257235597a41d78dc2ebe0ac SHA-256: 38b98982acf7ebb65317aa0330d1595e5bde9ace49508f285b105bce5482ff00
184 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicative of a link farm or phishing operation. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. The embedded URLs and the heuristic firings for PDF link farms suggest the primary goal is to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7771

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 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.
  • 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
  • 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://smidgel.ru/pbw?utm_term=what+is+banquet+set+up PDF link annotation
    • https://kedepojab.weebly.com/uploads/1/3/0/7/130739947/vafamela.pdfIn PDF document text
    • https://kugibiredatejag.weebly.com/uploads/1/3/4/3/134319346/0ada06.pdfIn PDF document text
    • https://gosinixubog.weebly.com/uploads/1/3/4/8/134875818/fovuvagulelizu-numam.pdfIn PDF document text
    • https://bazojarazete.weebly.com/uploads/1/3/4/6/134650598/59144a.pdfIn PDF document text
    • https://fanivimijebi.weebly.com/uploads/1/3/4/5/134594820/3499ad21454706c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/43469d6f-3a3c-4e31-83bd-3361e2042f8f/dabimeronaliwepevitidarav.pdfIn PDF document text
    • http://gozuwef.pbworks.com/w/file/fetch/144520674/manual_brady_bmp21_plus_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbbc983b-d976-465f-b6e5-3e0492d1abc1/linux_programming_interface_2nd_edition.pdfIn PDF document text
    • http://jozeluwofe.pbworks.com/f/32149836790.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/w/file/fetch/144507456/pixel_minimal_watch_face_promo_code.pdfIn PDF document text
    • http://zubipuwaf.pbworks.com/f/buparu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1dcdcc6-03f4-461d-ad62-02e3c7add4ba/wewufexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c70052-adb9-49f4-9ac8-df3c8cd17dc5/50276319485.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/w/file/fetch/144498777/ignou_assignment_front_page_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ae765bf-c8a5-4c69-990c-2390ee9fb08e/zedatezerobovivamojaw.pdfIn PDF document text
    • http://padimagofo.pbworks.com/w/file/fetch/144569655/kukawowimipitarexewo.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144485106/john_deere_240_skid_steer_manual_free.pdfIn PDF document text
    • http://jilawuxifi.pbworks.com/w/file/fetch/144548934/60193956056.pdfIn PDF document text
    • http://jolunatimavu.pbworks.com/w/file/fetch/144504630/61773392419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712d9331-ab4b-493f-b6e4-e7509dde4d1f/evenflo_car_seat_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b3f341-f84a-4081-8fb5-baf4cf813d6f/love_dare_day_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39d6509c-d2f4-447a-a61f-a1c8ff4194ac/what_is_the_best_free_color_by_number_app.pdfIn 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_off0000f1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EB 5060 bytes
SHA-256: 2efab207f6b573940eb413e476341d6098ef67e37a4423b3ad35eaf4708964c6
font_01_sfnt_off0001032d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032D 10480 bytes
SHA-256: f1e4ef676ab0c42ed9f91de1a8166b460323b101ab944b9ebe84d8774e6341cc

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