PDF malware analysis — malicious · 9f039f219a3519f2

MALICIOUS

PDF

122.1 KB Created: 2021-04-26 03:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 632e11ffe49fb5c6c74f4fd230438f31 SHA-1: 5a23e6162a663602400fd6a649c0bda9561df6db SHA-256: 9f039f219a3519f2fc1658997f6541e452e3b1d73c2383ef97e2ab69cbec3dee

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 other PDFs, suggesting a link farm or SEO abuse tactic. One of the extracted URLs, 'https://leonvi.ru/strik?utm_term=vizio+vw26l+hdtv+20f+service+manual', is presented as a service manual, likely a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

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://leonvi.ru/strik?utm_term=vizio+vw26l+hdtv+20f+service+manual PDF link annotation
- https://bubafoxir.weebly.com/uploads/1/3/0/8/130874260/88285fa0aeca418.pdfIn PDF document text
- https://sugibovipebu.weebly.com/uploads/1/3/4/7/134705953/fematoru-resipene-rixowalowarite-nezitawerem.pdfIn PDF document text
- https://kefepifumadig.weebly.com/uploads/1/3/1/3/131383651/3103726.pdfIn PDF document text
- https://donelodef.weebly.com/uploads/1/3/5/4/135401433/gazoke_roxanojovop.pdfIn PDF document text
- https://vinipuzi.weebly.com/uploads/1/3/0/7/130776781/jizojuvupumuzorose.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/bubeto/difuj.pdfIn PDF document text
- https://s3.amazonaws.com/regufojalojaza/nike_tech_fleece_zip-through_hoodie_in_navy.pdfIn PDF document text
- https://s3.amazonaws.com/napisakaluja/23811680022.pdfIn PDF document text
- https://s3.amazonaws.com/rizijubovapuk/sanifabusizijata.pdfIn PDF document text
- https://s3.amazonaws.com/wujixus/85023057294.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2b12d0a2-aa41-485a-88e9-908c5aaab4ab/commerce_sync_support.pdfIn PDF document text
- https://s3.amazonaws.com/jefazaxal/firex_i4618_beeping.pdfIn PDF document text
- https://s3.amazonaws.com/tenunud/sri_lanka_railway_history_sinhala.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/01c235f1-c6de-4dd4-9f8d-1fd1382f3e8c/survival_knife_csgo_price.pdfIn PDF document text
- https://s3.amazonaws.com/rufonali/burning_smell_coming_from_lg_washing_machine.pdfIn PDF document text
- https://s3.amazonaws.com/vovuzize/red_background_pictures_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8f5a52d5-e30e-4201-a820-4c24d794cf31/pobre_ana_chapter_5_summary.pdfIn PDF document text
- https://s3.amazonaws.com/tuletivotarupu/tibatunoxivojejupuriti.pdfIn PDF document text
- https://s3.amazonaws.com/lanubili/how_to_put_a_velvet_sleigh_bed_together.pdfIn PDF document text
- https://s3.amazonaws.com/kisagoz/29222294868.pdfIn PDF document text
- https://s3.amazonaws.com/vazisi/samsung_refrigerator_rf263beaesr_ice_maker_freezing.pdfIn PDF document text
- https://s3.amazonaws.com/fifomi/jowazap.pdfIn PDF document text
- https://s3.amazonaws.com/jixerubowi/66179219530.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/34607635-c1e7-4575-be5a-0f4261a3a2ab/bopoparegewenuz.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00017b8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17B8B	2960 bytes
SHA-256: `4c688c0676da4c9c3f1d636d29496b85ed1f90b4285ee9b780884cc7de0e34ac`
`font_01_sfnt_off000185fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x185FB	5856 bytes
SHA-256: `429550f3fc568e49225a01b17540be3245a34174fb33349ec18e16b6af12dbb7`
`font_02_sfnt_off000199e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x199E6	12484 bytes
SHA-256: `3966f81e094a96bf7a93206c513fcac69a18efd58c335e21a5878768fec63a0f`
`font_03_sfnt_off0001c46a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1C46A	16092 bytes
SHA-256: `39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67`

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