Malicious PDF — malware analysis report

Static analysis result for SHA-256 f907a777909d874d…

MALICIOUS

PDF

95.2 KB Created: 2021-03-09 23:31:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2e82d3b1447973174e6e2ce64198468b SHA-1: 1739008ac06400f66db4d1b724f0f834c13e26f6 SHA-256: f907a777909d874df53dfab278458cc1ad82356c95a710dc5d708a0df3208159
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/award?keyword=alter+ego+a1+cahier+d+activit%25C3%25A9s+pdf+free+download PDF link annotation
    • http://pubggaming.online/storm_racing_bluexme6o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_603e8f007aa92.pdfIn PDF document text
    • http://jarizodej.22web.org/82443184710.pdfIn PDF document text
    • http://ebay-coupon.ru/wubalulopoxidn0ooa.pdfIn PDF document text
    • http://antileqphh.site/samsung_j200g_cf_auto_roothvrdg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366008/normal_5ff40b42e47f9.pdfIn PDF document text
    • http://heleogose.online/yamaha_moto_4_80_for_saleg6ozg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dixuzudes.epizy.com/vezogazowoxebetovadonebu.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/gaspar_noe_irreversible.pdfIn PDF document text
    • http://vebaxabono.epizy.com/ceremonies_of_possession.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/speakeasy_gym_reseda.pdfIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_e1d0d6a6152b45a3afc19b6c03a043e3.pdf?index=trueIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_40e0707abbc5447ab25a2d3e16dc1e05.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/whatsapp_gb_2019_atualizado_uptodown.pdfIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_cd6ed0e1730b4bd8a05bac241223fb07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/befarekogol/rapeneloberevuful.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/php_numberformatter_ordinal.pdfIn PDF document text
    • http://sewogixura.rf.gd/beats_studio_3_wireless_headphones_black_and_red.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_c979b08fe537494fa7153fee26dce61b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rotowan/92893434371.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001232d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232D 5540 bytes
SHA-256: 905162d4a188bc404681f25b4fee280a51d6444b9e49dd2753678aff431fcfb0
font_01_sfnt_off000135cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CF 13136 bytes
SHA-256: 16aac0af1384525b5c55b2b2484d8815c6e40d32e7a32498abe9eaa6aafe269d
font_02_sfnt_off00015e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E97 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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