PDF malware analysis — malicious · e021d7091e364002

MALICIOUS

PDF

80.6 KB Created: 2021-05-19 08:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: d3f21fa204d479fbe195edc6e6c70b7f SHA-1: 6904bd19b73c2507553c92ac82808d3ce05f0b8a SHA-256: e021d7091e364002bf19494c2ff8a444bcd9c081f0afc5207afd4c44703120e3

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic and ClamAV detection. The ML classifier also flagged the PDF as malicious with high confidence. The primary URL, 'https://baarspo.ru/strik?utm_term=fundamentals+of+heat+and+mass+transfer+5th+edition+solutions', suggests a phishing or malware distribution attempt disguised as academic content.

Machine Learning

Nyx PDF Classifier malicious score 0.9961

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://baarspo.ru/strik?utm_term=fundamentals+of+heat+and+mass+transfer+5th+edition+solutions PDF link annotation
- https://cdn-cms.f-static.net/uploads/4389794/normal_60311991a17b8.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4386849/normal_60059f485a5e2.pdfIn PDF document text
- https://jefamozalubibul.weebly.com/uploads/1/3/1/4/131438275/39f92.pdfIn PDF document text
- https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/gixepitil_nabadugolefimam.pdfIn PDF document text
- https://muxavitegujun.weebly.com/uploads/1/3/1/6/131637584/c782eada207.pdfIn PDF document text
- https://xasedomag.weebly.com/uploads/1/3/1/0/131071243/e214485dd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4499021/normal_60134456e5b86.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4411220/normal_5ff518f806a1d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4369648/normal_5fc590a92b3a2.pdfIn PDF document text
- https://sekilulijafos.weebly.com/uploads/1/3/1/4/131438177/087d1.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4465403/normal_5ffa9aba37b35.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4406785/normal_605056e31b153.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448556/normal_60199512dabc1.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/ae3ac2bb-c4d3-4bd5-82d8-be272efb2fe3/gixojixafinepipudafivoru.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0288688d-ba6b-4eba-8577-edd83b2c889d/pazanobejotolosaredavil.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ea84bd6e-5014-428d-beb2-b6368719b32a/xelinezoberazo.pdfIn PDF document text
- https://s3.amazonaws.com/palikuvexake/countable_uncountable_exercises_with_answers.pdfIn PDF document text
- https://s3.amazonaws.com/minegikukovel/live_dashboard_google_sheets.pdfIn PDF document text
- https://s3.amazonaws.com/sagotomagin/whats_the_best_golf_gps_app_for_apple_watch.pdfIn PDF document text
- https://s3.amazonaws.com/fekaduvopigab/81088847317.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7dedf906-d064-4473-953a-1e13a5b76349/how_to_increase_arcane_power_maplestory.pdfIn PDF document text
- https://s3.amazonaws.com/gatazeromij/akele_hum_akele_tum_movie_300mb.pdfIn PDF document text
- https://s3.amazonaws.com/dutimajizowa/gpat_question_paper_with_answers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bf4aca52-69b6-4526-aed6-1e5dd42f952a/paintball_jungle_waiver.pdfIn PDF document text
- https://s3.amazonaws.com/teximikamukubo/evaluating_exponential_functions_worksheet_answers.pdfIn PDF document text
- https://s3.amazonaws.com/jozaponi/avast_driver_updater_crack.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_off0000fc00.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC00	5224 bytes
SHA-256: `c63ac964d3213dcc02a820d66613febbe53fb4e67a0f37ffb98d10f45b689990`
`font_01_sfnt_off00010d9f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D9F	11332 bytes
SHA-256: `37b8168a94fc7b1b25049af4d2e10974c02d0bf572174afa93b75ca9ca97e565`

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