Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf78f3362be8725…

MALICIOUS

PDF

82.0 KB Created: 2021-03-25 13:55:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dc2d2de10fb246eb94d11399beccaee SHA-1: d69bb5404f8c761213218c2bcc6b447dbe04f6c9 SHA-256: fdf78f3362be872591f1325501a58c159f948b434cdab623fe69bf065fac8a26
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary external URI points to a URL that suggests a lure for a 'hacked apk', indicating a phishing or malicious download attempt. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs strongly suggest an attempt to redirect users to malicious content, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/wix?keyword=trials+frontier+hacked+apk
    • http://timinipitos.22web.org/48007961107.pdf
    • http://kopuvimu.scienceontheweb.net/how_to_set_profit_target_in_forex.pdf
    • https://pulimogub.weebly.com/uploads/1/3/4/3/134312020/talupevupamirem.pdf
    • https://morexenuf.weebly.com/uploads/1/3/5/3/135311883/062af36a1.pdf
    • https://romubavopu.weebly.com/uploads/1/3/4/8/134884942/8024090.pdf
    • http://dogalijun.scienceontheweb.net/homemade_fishing_bait_for_catfish.pdf
    • https://lukibufipijuzom.weebly.com/uploads/1/3/3/9/133997252/lojorajuro.pdf
    • http://punejew.mygamesonline.org/66603163448.pdf
    • https://bewevirat.weebly.com/uploads/1/3/1/4/131437926/40df81cfebae9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_5eca7f13cd634181a31e12887858751a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/11e0bd86-fc95-4304-8bee-f8032615419f/safijotetekuruduzubumolom.pdf
    • https://uploads.strikinglycdn.com/files/2d6ab235-fb43-4f05-a7fd-e03db4616707/30366943019.pdf
    • http://jegeraf.rf.gd/proving_lines_parallel_with_algebra_worksheet_answers_gina_wilson.pdf
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_e257535c02c1479cad61fcbb4e6ca196.pdf?index=true
    • https://uploads.strikinglycdn.com/files/58682fdf-9835-4457-ae80-3c2ae2cc5179/82372635760.pdf
    • https://uploads.strikinglycdn.com/files/96956e15-8bdf-4fc9-b393-656030fca3f3/how_to_reset_epson_printer_to_default_settings.pdf
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_cc15570775004008998c103c1be4ee37.pdf?index=true
    • https://uploads.strikinglycdn.com/files/88a66cd2-bd2d-4764-9c61-7f023a92a1a9/didirukoderujoto.pdf
    • https://uploads.strikinglycdn.com/files/2a3cf468-fbee-489c-bba0-cd160b521aa3/honda_shadow_1100_carburetor_diaphragm.pdf
    • http://rojapamun.epizy.com/demo_warlock_guide_pvp.pdf
    • https://uploads.strikinglycdn.com/files/21114dad-da88-4a41-89b6-e03ae95cd8a4/ronanoso.pdf
    • https://uploads.strikinglycdn.com/files/cfa175a6-c2b1-4d88-9dc4-5427b8f88978/introduction_to_probability_and_statistics_susan_milton.pdf
    • https://cb0920a4-0dfc-4587-8161-bd3bf883b043.filesusr.com/ugd/df391a_783e575e39eb43af957d9d40a5c593e7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f9765c84-c281-426f-90ff-0766a13b2bfd/xevigezexuwexusala.pdf
    • https://uploads.strikinglycdn.com/files/e7f1d369-0c4f-497c-ba08-fc5c053dd72d/kijobewewape.pdf
    • http://nexopuvesoreben.epizy.com/world_press_photo_en_mexico_2014.pdf
    • https://48b7024d-7414-4593-b44d-ed892b96ad15.filesusr.com/ugd/3e5db3_43c9fd4e18dd41d389319d366f8bce8a.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f981.bin
e7a79a8a4e5802d5f0116973367abd10b5d2a1c252222039a61ee5112993b3ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF981 5256 bytes
font_01_sfnt_off00010b5a.bin
8f011df32955872ba3c0959799615ce46bfb37921f301e9a1b645324ce8ae421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5A 14136 bytes

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