Malicious PDF — malware analysis report

Static analysis result for SHA-256 873445502b6430a9…

MALICIOUS

PDF

86.9 KB Created: 2021-04-04 10:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a62e99500237f967ccc231719644cbc SHA-1: 82fc5e45bedb7959daee6255c4d69343d4a4679f SHA-256: 873445502b6430a9a5c540e8572307448185fc32e0bbdce6e78cf3604f54973c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The embedded URLs likely lead to malicious sites designed to trick users into revealing sensitive information or downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=sears+craftsman+16+inch+variable+speed+scroll+saw+manual
    • http://tozaworewinox.mywebcommunity.org/electronic_band_structure.pdf
    • http://goligofalu.medianewsonline.com/dell_optiplex_gx280_tower.pdf
    • http://newoxoxi.mywebcommunity.org/24933971109.pdf
    • http://paxijivatebul.getenjoyment.net/four_letter_words_in_english_for_kindergarten.pdf
    • http://xafomona.mypressonline.com/data_warehouse_design.pdf
    • http://vorakumezaxof.mygamesonline.org/tagebipido.pdf
    • http://dinewegivogofe.mygamesonline.org/88412343159.pdf
    • http://nesebonuvobeju.getenjoyment.net/43034802242.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://ad5375d1-0dc8-447d-a54b-f1659eeba1ba.filesusr.com/ugd/a4ba79_15a15fd085d44b9c83f205baddff15b6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/36a5ded2-43ed-4282-976f-5092b3fba309/kebasovexamukukikejeji.pdf
    • https://uploads.strikinglycdn.com/files/5192f4e8-e812-486c-aae4-8460866d06fa/72296990126.pdf
    • http://nubirumoxid.onlinewebshop.net/84039255346.pdf
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_0920d7b660fc45cf9d6a11693a0ee309.pdf?index=true
    • http://dafudezukixoz.epizy.com/tobiwofod.pdf
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_f0ad2b5cb8e74e448ae5a1443dbf09aa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9885f63f-1295-4e7f-9ee8-5c9e9481e8c0/borinimelowuraxugopojux.pdf
    • https://uploads.strikinglycdn.com/files/4836a407-1c91-4254-91bf-3a119d157149/kim_kardashian_selfie_book_download_free.pdf
    • http://redebalumu.rf.gd/vogodulaximov.pdf
    • https://uploads.strikinglycdn.com/files/ae888d37-7a9a-42a2-8498-906bdac1cb2a/how_many_calories_in_a_shredded_chicken_burrito_from_taco_bell.pdf
    • https://uploads.strikinglycdn.com/files/a5c17b39-a186-458f-85d6-9b463f31658c/febopipemomidufuzosog.pdf
    • http://watawazorino.rf.gd/hey_siri_call_my_girlfriend_ringtone.pdf
    • https://uploads.strikinglycdn.com/files/6fe95971-defb-4f98-9e3a-a1a61a6938f7/do_wendys_nuggets_have_eggs.pdf
    • http://rajemezipuz.rf.gd/schubert_impromptu_op_90_no_2_sheet.pdf
    • http://jatoxat.atwebpages.com/8422000869.pdf
    • https://uploads.strikinglycdn.com/files/8d4a7a0b-a057-4636-8c59-3670ab470896/punasofesafadororupup.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001021c.bin
81143cef2382ba5f451839841055ec51bb0b09ee1039c78733dff0fbc5cdd033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1021C 5880 bytes
font_01_sfnt_off000115f2.bin
6a9e4da345f1cb606242a480200423b17e008cafe186f94c87f6e14715ae3480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115F2 11920 bytes
font_02_sfnt_off00013ee0.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE0 4324 bytes

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