Malicious PDF — malware analysis report

Static analysis result for SHA-256 35889a02f5012494…

MALICIOUS

PDF

118.7 KB Created: 2021-03-14 02:28:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5aac7b0ba685bf5d5f7dd0bac71bc160 SHA-1: b49901ec5482fc56b2fd63af98a7499d8d3c913f SHA-256: 35889a02f50124944a75c944ab88aa701c5baff5bf394dedb258463605495692
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing numerous external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_URI' heuristics. ClamAV and ML classifiers also flagged the file as malicious, specifically as a phishing trojan. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://ponafet.ru/award?keyword=impulse+buying+modeling+its+precursors+pdf PDF link annotation
    • http://raifaisentgo.online/kibafefapemq22de.pdfIn PDF document text
    • http://i-men.ru/greenlight_nypd_setwpil7.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/hamilton_vocal_selections_free.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/23753095770.pdfIn PDF document text
    • http://netewe8.xyz/xuladudidavopugijaditoly54vk.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/what_is_48_cm_in_mm.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/5bdb9900-a0a6-4bcd-8e25-0a70201b1d85/little_shop_of_horrors_2019_cast_recording.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1851b5-0868-4c58-a33a-e205454ec680/best_pool_heater_repair_service_near_me.pdfIn PDF document text
    • http://boxitevu.rf.gd/transistor_series_voltage_regulator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/493432aa-08da-438c-a533-7f03b63c112a/casio_w-800h_watch_strap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57f5974-5f15-4784-b393-908735f19641/41002461525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0db96aa2-587e-4692-aa10-0bbdf1a2bbd3/html_tags_and_uses.pdfIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_4e14686fef7c4374a4936e3caeb7265c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74a63be-fa70-40b1-b24d-1281c1e93ca0/palipofinosonujilelitov.pdfIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_612c46a235f54863b0d8bf22f959f19a.pdf?index=trueIn PDF document text
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_6d5ecd23b9ce46b6afb124bcf7983d54.pdf?index=trueIn PDF document text
    • http://bebovufuvuji.myartsonline.com/adaptation_of_animals_in_different_habitats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ceeaec-ac08-46b7-bbb3-4f43cf99b73a/how_to_set_up_graco_double_stroller.pdfIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_44313b93f03e4b1f8f75de713cfc1fe2.pdf?index=trueIn PDF document text
    • http://jegivumupokafar.epizy.com/92332000509.pdfIn 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_off0001943d.bin
1577d2986535b07e538029737d61299ba07d35fa659b5269f9b4f9412f6c070e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1943D 5444 bytes
font_01_sfnt_off0001a6b5.bin
c1d61a9cf3a44c13932dde5dc6a5e7743148d5a988e263c19c7b4f3941042a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6B5 11228 bytes

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