PDF malware analysis — malicious · 7d9fdc77bd35462e

MALICIOUS

PDF

79.0 KB Created: 2021-06-03 00:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10

MD5: 44b2de18b57781c19ac0f26e20c7e209 SHA-1: 477a8c58a29a0f408a245d7fe85bad1f8575b80e SHA-256: 7d9fdc77bd35462e540fd04bb7568a93b8d32d31afff71d85ae3c0586fe0f392

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to link farms, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://infrive.ru/pbw?utm_term=ap+world+history+exam+2019+answers PDF link annotation
- https://static.s123-cdn-static.com/uploads/4465389/normal_5fc5715ac1893.pdfIn PDF document text
- https://samarobiratepiw.weebly.com/uploads/1/3/5/3/135327643/5283090.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4483097/normal_60b7f40eecd0c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417805/normal_600558e84660c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4443809/normal_601f6bfbd7cbe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4422914/normal_6004c1b8460f1.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4377371/normal_5fe05863737f0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404529/normal_606aba972bbfc.pdfIn PDF document text
- https://metenesepagozo.weebly.com/uploads/1/3/4/7/134710396/153b533edebb2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4474448/normal_601fbce5b1d58.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424029/normal_600fcd5d0b960.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4417814/normal_5ffdee09e4e23.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4501654/normal_5fca0e43603d0.pdfIn PDF document text
- https://julamebuviweto.weebly.com/uploads/1/3/4/5/134509829/talazapizupufolupe.pdfIn PDF document text
- https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/nexenelujabunir-tefis.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4463287/normal_5fe3dd248e909.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://demopefo.pbworks.com/w/file/fetch/144529434/how_to_pair_phonak_hearing_aids_with_ipad.pdfIn PDF document text
- http://niwomif.pbworks.com/w/file/fetch/144424557/coordinate_plane_word_problems_worksheets.pdfIn PDF document text
- http://tejudafo.pbworks.com/w/file/fetch/144460587/65235462877.pdfIn PDF document text
- http://demopefo.pbworks.com/w/file/fetch/144528780/wegowabup.pdfIn PDF document text
- http://jebodigezev.pbworks.com/w/file/fetch/144511989/europass_format_doc.pdfIn PDF document text
- http://fodorafirig.pbworks.com/w/file/fetch/144446667/is_a_three_day_split_enough_workout.pdfIn PDF document text
- http://werinenimuta.pbworks.com/f/pauvre_anne_chapter_4_answers.pdfIn PDF document text
- http://kimotamiju.pbworks.com/f/how_to_set_a_lux_thermostat.pdfIn PDF document text
- http://lagawiwefe.pbworks.com/f/hisense_android_tv_2021.pdfIn PDF document text
- http://rugewenuzed.pbworks.com/w/file/fetch/144420294/lumedibelazepabap.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_off0000e75c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE75C	5720 bytes
SHA-256: `6d87c5d51c6fbec5daebd27600ae29f66809da7b70eff6a070ef0fc949ad8ace`
`font_01_sfnt_off0000fac4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAC4	11016 bytes
SHA-256: `0e5486392532844a2c6f8030967debb28a5cd106ede6adc01ab37a20dc3f56a1`
`font_02_sfnt_off00012065.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12065	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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