PDF malware analysis — malicious · 55b1741447350a7a

MALICIOUS

PDF

89.2 KB Created: 2021-04-01 23:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 65b19da559654269d869ac4493c96408 SHA-1: 1eae091c8be91adf60510a95435fecf3a1604b40 SHA-256: 55b1741447350a7a41c97cc00ae24ad0ad2b6e65b088ec1bee3f5a45d2028761

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. Numerous embedded URLs, many pointing to disposable domains and link farms, suggest a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains keywords related to product resets, which could be used as a lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://pelibifir.ru/strik?utm_term=honeywell+thermostat+rth6580wf+factory+reset PDF link annotation
- http://kolagozisil.mywebcommunity.org/que_enfermedad_es_cuando_se_cae_el_pelo.pdfIn PDF document text
- http://migerov.xyz/what_is_the_relationship_between_height_and_shoe_size_correlateloqzl.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500665/normal_5fd62c7f16427.pdfIn PDF document text
- http://christinaanddavid2019.com/dobesaralukavovununm2wrj.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369191/normal_605656a28d090.pdfIn PDF document text
- http://jepegupunu.mygamesonline.org/fevawenofizadiwisuwodevu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387226/normal_604eb38d8007c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4390092/normal_6039b8dc316f8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4390350/normal_600016b310fe3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4416669/normal_5fc9458db08bf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488604/normal_603bdaefc7a51.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/1d851918-278f-4cf3-bf35-933c6841fb0f/73152851973.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5a6805ff-5612-49d0-a531-43d4e15b0399/rifalowinijemipizawas.pdfIn PDF document text
- http://jeximojela.myartsonline.com/wozid.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9c2f6b92-bf19-472a-9074-28a617610a2e/final_fantasy_xv_a_new_empire_cheats_2020.pdfIn PDF document text
- https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_bda8247339864f19895b7e6002a73f5b.pdf?index=trueIn PDF document text
- http://lejiletuvasipib.onlinewebshop.net/moramonalupusababekil.pdfIn PDF document text
- http://zubiluwetij.myartsonline.com/juzusizapeluli.pdfIn PDF document text
- https://efe523a3-d756-4f55-ba91-412f3a718e00.filesusr.com/ugd/236571_1566d67029874589b4a36e3c413884fa.pdf?index=trueIn PDF document text
- https://a208a2de-cee2-48c2-86e3-c620a022946d.filesusr.com/ugd/dda32d_ee92899c8c4e49fb90d025156c86bcae.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/d80e37de-8169-41d1-b8ac-623a9bbca5eb/can_division_ii_colleges_offer_athletic_scholarships.pdfIn PDF document text
- https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_8810da53949f402392011823b26aee74.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010376.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10376	6712 bytes
SHA-256: `dd179f20c02a141c797c1190f7342d94a699e750f5beb24e38c3cee32df02987`
`font_01_sfnt_off00011a72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A72	5892 bytes
SHA-256: `3b8169ce49c871c71f0c3b3e48ee3a4e44fab2257a72bcedf8f10f96cc259cb5`
`font_02_sfnt_off00012e6a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E6A	12008 bytes
SHA-256: `3eca2eb1821ae9dd6d8a64f125d7e4538196bdf8855342080163b2873e7b5270`

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