PDF malware analysis — malicious · 08a28dffc1bb69b8

MALICIOUS

PDF

127.7 KB Created: 2021-03-23 19:12:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: c220370fad3bbb536307c81aded6d440 SHA-1: e6a01cac305d991000bc2048c8cf0c980bbb7667 SHA-256: 08a28dffc1bb69b895b42be8429b85813d21a969a64d4ca215aeca397a983b11

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm on disposable hosting. Numerous embedded URLs point to potentially malicious sites, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent, likely related to spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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/wix?keyword=march+mammal+madness+2019+waterfalls PDF link annotation
- http://sejamilipigiseb.iblogger.org/urticaria_cronica_autoinmune.pdfIn PDF document text
- http://good-production9.site/le_mythe_de_sisyphe_english_translationl5sqh.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4443292/normal_6001590234d5c.pdfIn PDF document text
- http://wijetaz.mypressonline.com/xamedizuzaxevafop.pdfIn PDF document text
- http://lenafitokid.iblogger.org/tiwominebopu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417312/normal_5ff8ef68cb242.pdfIn PDF document text
- http://kikaxefe.22web.org/29649915662.pdfIn PDF document text
- http://axecheat6.xyz/how_to_change_a_first_alert_smoke_alarmns5hi.pdfIn PDF document text
- http://helpcenterbusiness.xyz/missing_you_now_song6wper.pdfIn PDF document text
- http://gejokakop.mygamesonline.org/725357294.pdfIn PDF document text
- http://kerorakesona.22web.org/mac_cheat_sheet_for_pc_users.pdfIn PDF document text
- http://mebovedu.getenjoyment.net/75706206686.pdfIn PDF document text
- http://jovopomutulilo.medianewsonline.com/employment_status_form.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4491925/normal_5fe12a48c3749.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
- https://uploads.strikinglycdn.com/files/1cbc057f-484c-4ce1-a209-96e63cf3c775/pabodonuxegaleluje.pdfIn PDF document text
- http://pawiruf.rf.gd/newoveliv.pdfIn PDF document text
- http://tiwatimab.atwebpages.com/xifoxawapaweferamelimeteg.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/faafcc75-7377-42be-ae65-482f058a9360/what_does_the_bible_say_about_god_being_a_promise_keeper.pdfIn PDF document text
- http://koxowasone.epizy.com/free_accounting_journal_entry_template.pdfIn PDF document text
- http://lefumus.rf.gd/running_lean_no_codes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/20b98c6f-0f0f-4de6-8c86-53f4e6f5da54/35423637047.pdfIn PDF document text
- http://jorowubibe.epizy.com/endnote_x_free_full_version.pdfIn PDF document text
- http://rogidisili.rf.gd/74913989416.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4becc357-700b-49cd-bc64-7cec62fb87e2/xunem.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0001a6a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A6A0	5472 bytes
SHA-256: `f35e64a62672d3f16c440f53faeca16ba95d74ced043a9e9d7f68f09109154e4`
`font_01_sfnt_off0001b922.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B922	12592 bytes
SHA-256: `6c3c793da2d97755bfb62d7cf6cb634b7f038055a4ab2cf31d01fb23f48a9b3c`
`font_02_sfnt_off0001e2d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1E2D5	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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