PDF malware analysis — malicious · 2cb8c8dc163927f2

MALICIOUS

PDF

89.9 KB Created: 2021-04-27 12:19:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16

MD5: 74d44dd66ecacf085c3db59f59bf47d4 SHA-1: 4cd46dcb3d25e5cf7abcc9e3ab6f51fdf2fa55e8 SHA-256: 2cb8c8dc163927f292a30f0a67f879bd034054ea876e79add951ff20064087a8

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with the first identified link being to 'https://malinozibide.weebly.com/uploads/1/3/4/3/134380659/dagorevevif.pdf'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content. The presence of many external links suggests an attempt to redirect users to malicious or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 6

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://resalured.ru/strik?utm_term=cast+of+diary+wimpy+kid+dog+days PDF link annotation
- https://malinozibide.weebly.com/uploads/1/3/4/3/134380659/dagorevevif.pdfIn PDF document text
- https://cdn.sqhk.co/nebafori/yjhic3R/sizuvoxazigeserexim.pdfIn PDF document text
- http://store50off.info/wakavurufa2eh3n.pdfIn PDF document text
- http://gobigs.space/ryobi_rm480e_parts_diagram1saob.pdfIn PDF document text
- https://zakutawevuvukug.weebly.com/uploads/1/3/5/9/135970657/7363561.pdfIn PDF document text
- https://cdn.sqhk.co/mogezunir/aBjbjcD/second_trimester_pregnancy_symptoms_week_by_week.pdfIn PDF document text
- https://dubilovatigalis.weebly.com/uploads/1/3/4/7/134701517/e1307c.pdfIn PDF document text
- http://natiral.space/how_to_reset_a_dewalt_20v_batterydcvip.pdfIn PDF document text
- http://20970907.net/7322717015am1m5.pdfIn PDF document text
- https://cdn.sqhk.co/xovatagemi/j4Nmn27/touch_n_go_top_up_app.pdfIn PDF document text
- https://cdn.sqhk.co/rorezina/ieUjjgi/temijusukiduwawul.pdfIn PDF document text
- http://swiss-gear.shop/how_to_write_supplemental_essays_for_collegeglwu9.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://49d0234c-aae4-472d-9cb9-6192e9e03354.filesusr.com/ugd/a63595_ee5e7705ad3149a89f2c5d3d46e60cc7.pdf?index=trueIn PDF document text
- https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_14fe1bce366245f9a2cd13837736147c.pdf?index=trueIn PDF document text
- https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_c9b3d4cb653042b1b4a1ad72e24b0001.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mokixetat/23160312727.pdfIn PDF document text
- https://s3.amazonaws.com/tokatefozude/17715962836.pdfIn PDF document text
- https://s3.amazonaws.com/nasitevu/how_to_effectively_assess_student_learning_outcomes.pdfIn PDF document text
- https://s3.amazonaws.com/lusegokaves/cable_tv_guide_uk.pdfIn PDF document text
- https://s3.amazonaws.com/wowonesoribu/chanel_boy_size_guide.pdfIn PDF document text
- https://s3.amazonaws.com/jepinebawo/48178202087.pdfIn PDF document text
- https://s3.amazonaws.com/tetofamuxulil/nadoxemaxedob.pdfIn PDF document text
- https://s3.amazonaws.com/safenalavojuwu/how_to_repair_home_ac_unit.pdfIn PDF document text
- https://s3.amazonaws.com/gurupixabogivaz/36351849781.pdfIn PDF document text
- https://s3.amazonaws.com/fuzafuzeruwit/27873228403.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00011bac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11BAC	5492 bytes
SHA-256: `897c1bcf083ae1c48b129ac8d75a15d29294544f5b70b3f3e1d9bff0f0dc8f38`
`font_01_sfnt_off00012e63.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12E63	13096 bytes
SHA-256: `3cacb1a2191200271da7398a394f23595b08f97165f9a2c90aebe5e433c9d91c`

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