PDF malware analysis — malicious · a0702b63e7174f3e

MALICIOUS

PDF

94.0 KB Created: 2021-03-18 17:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13

MD5: e4b1a451df7f66b3e67f107c7e342fa5 SHA-1: 522b1637e669beed335fa4b9cae8cb805dacfd57 SHA-256: a0702b63e7174f3ec626a14af7a94bac2742526ddc9c796e9ca0703ad3b2c856

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it's part of a link farm or SEO manipulation scheme. The presence of embedded URLs and the overall structure strongly suggest it's designed to lure users to potentially malicious or phishing content, aligning with the Spearphishing Attachment technique.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 6

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.
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://botokaw.ru/wix?keyword=conjunction+list+in+gujarati+pdf PDF link annotation
- http://jedusajinud.mygamesonline.org/how_many_scoville_units_is_taco_bell_hot_sauce.pdfIn PDF document text
- http://gukopujix.22web.org/tre_trauma_releasing_exercises.pdfIn PDF document text
- https://ludiwutigavas.weebly.com/uploads/1/3/4/6/134697468/bomozatonujaluw_jikejuxutox_wawoweputisefit_bunoliwiduda.pdfIn PDF document text
- https://fomemifeju.weebly.com/uploads/1/3/4/7/134769467/zirafegijita.pdfIn PDF document text
- https://fugopezawisobib.weebly.com/uploads/1/3/1/3/131383650/03c14ecc8e8.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.indictrans.orgIn PDF document text
- https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_12d34e72a0c745d383c63c35fdf4b3f6.pdf?index=trueIn PDF document text
- http://dijijesuwaxon.epizy.com/apa_mla_guidelines.pdfIn PDF document text
- https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_7772d331697340609777519f665a7d49.pdf?index=trueIn PDF document text
- http://vusukunuvedigup.epizy.com/fate_grand_order_summer_event_2018_guide.pdfIn PDF document text
- https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_696a0d92be78483d9df49b3772351213.pdf?index=trueIn PDF document text
- http://nizofikunatafu.atwebpages.com/subject_verb_agreement_worksheets_3rd_grade.pdfIn PDF document text
- https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_493083bf25604b4ca1e30b403cff7082.pdf?index=trueIn PDF document text
- https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_ca988b3853a249f28abc62b3a7a0c80c.pdf?index=trueIn PDF document text
- https://42cc6f6d-9125-48bc-bce4-1bf15f49b1be.filesusr.com/ugd/7c30af_f41033d711db4772845dd05c2898e511.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/d68f9ce1-f783-4988-8692-a2f0aa724697/79288856849.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4821047c-c86a-474f-ab84-039249757cbe/bojuwoxaj.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_off00010bb8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BB8	5304 bytes
SHA-256: `4b3a5dd958e7fb834fcd1ca88dbe432a00b39728075278782dbc13377b5bb4b7`
`font_01_sfnt_off00011dd6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DD6	12936 bytes
SHA-256: `ca0191fce43ca316f5b2c4e6af397c6678f9a76d7b57fc5caa89ea0ce4712ee3`
`font_02_sfnt_off0001469a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1469A	10532 bytes
SHA-256: `f3ceae0af909e5cf0700b8b5d26b11a3ce30003449ca5075fcad86baff74c1b4`

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