PDF malware analysis — malicious · 2974c93981a0f923

MALICIOUS

PDF

92.5 KB Created: 2021-05-17 04:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20

MD5: 0d89073ae8f40f001685e1be7d5f0b29 SHA-1: 6321ade158dfccd40cdbfa3bf5202cdf8b1ac4a2 SHA-256: 2974c93981a0f923bb14a49b4879d77ac4330f26efdc6c49a79afdec19c5aada

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous external URIs, with one prominent URL suggesting a lure related to machine learning books. This URL likely serves as a redirect to a malicious site, indicating a phishing or credential harvesting attempt. No scripts were extracted, but the PDF structure and URI firings strongly suggest a malicious intent to redirect the user.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

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://mezovuduw.ru/strik?utm_term=best+machine+learning+books+for+beginners+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4365580/normal_5fdbe1fc15b7d.pdfIn PDF document text
- http://vepenuvix.mygamesonline.org/27741482185.pdfIn PDF document text
- http://xuvaguwanolinu.66ghz.com/capital_expenditure_policy_template.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405930/normal_60297fd169043.pdfIn PDF document text
- http://kismykeitio.best/34177241579234ue.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4458137/normal_605a36a3566c7.pdfIn PDF document text
- http://vejuwetuk.mypressonline.com/venepanopezap.pdfIn PDF document text
- http://revilokepudidu.mygamesonline.org/do_the_words_mom_and_dad_need_to_be_capitalized.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466143/normal_5fe8e574c0958.pdfIn PDF document text
- http://9gusevshop.website/441427969drpng.pdfIn PDF document text
- http://hdvideo.design/sajakakijadaturinofipofmxtw6.pdfIn PDF document text
- http://instup.xyz/adc-v520ir_default_passwordacvem.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4412895/normal_602804e7d66eb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378383/normal_6053144237325.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4479679/normal_5fdcd31364f2a.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://s3.amazonaws.com/xarojapi/directv_rc65_remote_code_for_lg_tv.pdfIn PDF document text
- http://pigutun.myartsonline.com/lazikawavelokubuwegesemi.pdfIn PDF document text
- http://vikitadutuxorus.rf.gd/citizenship_article_5_to_11.pdfIn PDF document text
- https://s3.amazonaws.com/xedewofuretujo/72100781260.pdfIn PDF document text
- https://s3.amazonaws.com/wajufifenoxuj/geog._1_workbook_answers.pdfIn PDF document text
- http://jusekajuno.epizy.com/26353316969.pdfIn PDF document text
- https://s3.amazonaws.com/pegebunov/cursive_handwriting_sheets_alphabet.pdfIn PDF document text
- http://dolojivek.onlinewebshop.net/pathfinder_bestiary_6_free_download.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010e2c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E2C	5608 bytes
SHA-256: `3a8d253f202166f3f2ade9f66c203ce47d26d44c6e70be5172a091521da2c359`
`font_01_sfnt_off00012103.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12103	3120 bytes
SHA-256: `fde507d3e12ec33e68adf7e75fc7402ffd28b0db1492fb6dd1e3c49ab7b9519b`
`font_02_sfnt_off00012d88.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D88	11268 bytes
SHA-256: `fa3504e458e81a19d3eb3c7f1e25aa39170f53b7ef4731ed230cabdc9ec54863`
`font_03_sfnt_off00015370.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15370	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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