Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6c8a2c9ed99019…

MALICIOUS

PDF

226.5 KB Created: 2021-03-15 19:29:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7a96ed5f1c258cef0b306e93cc76bf96 SHA-1: d73a7aa5fca5394291342cb59159e8c751e3b332 SHA-256: ad6c8a2c9ed990192c155ba09cb1a7b8ec284482e308da7f5577273d357c7d68
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It impersonates Facebook to lure users into providing credentials via a link that leads to a redirector. The document body contains garbled text, but the presence of external URIs and the phishing lure strongly indicate a credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9859

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://pakefipeve.weebly.com/uploads/1/3/4/0/134017053/0b1ec.pdf.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/strik?utm_term=mta+subway+map+new+york PDF link annotation
    • https://pakefipeve.weebly.com/uploads/1/3/4/0/134017053/0b1ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_5fe90630a7a81.pdfIn PDF document text
    • https://zipobirin.weebly.com/uploads/1/3/5/3/135386694/839bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490534/normal_601f7f127ab78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487200/normal_6048fcbd9fb75.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/jb0jcij/shudder_meaning_into_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/OiiibRu/rome_total_war_2_cheats_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366995/normal_5fede05c69f51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413361/normal_5ff8b5e1e12f6.pdfIn PDF document text
    • https://ruwagifixub.weebly.com/uploads/1/3/4/0/134013037/da012706.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/d0beee71-5791-4164-a8fc-2184f60e9e56/amazon_video_games_playstation_4.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_aad31ad72020474e8014868e3b4d4026.pdf?index=trueIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_3dc28cfa1fa743b98173ed0d257280f9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69dab975-1365-4682-bfaf-3907d1ec5129/what_is_a_action_verb_list.pdfIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_0f9ade43138a4e06bbc51c74a6be438f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e955867a-d66e-440c-867a-fec4275a2ad5/microsoft_wireless_keyboard_2000_power_button.pdfIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_98fde48460cc41799b2c85a13961463a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c70e7f-8152-4ab8-b060-70c2d176e585/jexejatoditukimexalozekax.pdfIn PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_6ace8783446b46b798096952f7faddc2.pdf?index=trueIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_7beba449d0194db2a80bbd36f85439c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e01a2cd-1712-43a7-b14d-561f628c109c/which_of_the_following_is_an_example_of_heat_transfer_by_radiation_brainly.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_b436ab2774004d66afd4fcdd93c46f3d.pdf?index=trueIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_d8dbbd1b07f64edfb1ef26e243aca29f.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00032636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32636 5336 bytes
SHA-256: 861707088c1f9371b200bac47a0dc36e4a07838b77122b3237252062a121e2c7
font_01_sfnt_off0003386a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3386A 13364 bytes
SHA-256: cc24ef4d0dda4a56e978f638a0a903ecb9cc8a424e71e6534b2e45a54202b923
font_02_sfnt_off00036613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36613 16344 bytes
SHA-256: 7e0863d6dcdfe3ce59f67395a06e5e8634226e44f713773c85e494ff6d119ee1

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